diff --git a/aifont.py b/aifont.py
deleted file mode 100755
index 5898faa..0000000
--- a/aifont.py
+++ /dev/null
@@ -1,74 +0,0 @@
-#!/usr/bin/env python3
-import subprocess, sys, os
-
-# download MesloLGS NF
-meslo = "/tmp/MesloLGS NF Regular.ttf"
-if not os.path.exists(meslo):
-    meslo_url = "https://github.com/ryanoasis/nerd-fonts/releases/latest/download/Meslo.tar.xz"
-    subprocess.run(["curl", "-sL", "-o", "/tmp/Meslo.tar.xz", meslo_url], check=True)
-    subprocess.run(["tar", "xf", "/tmp/Meslo.tar.xz", "-C", "/tmp", "MesloLGSNerdFont-Regular.ttf"], check=True)
-    os.rename("/tmp/MesloLGSNerdFont-Regular.ttf", meslo)
-
-# download SVG icons
-base = "https://git.syui.ai/ai/app/raw/branch/main/icon"
-for name in ["ai.svg", "syui.svg", "bluesky.svg"]:
-    subprocess.run(["curl", "-sL", "-o", f"/tmp/{name}", f"{base}/{name}"], check=True)
-
-subprocess.run(["fontforge", "-script", "/dev/stdin"], input=b"""
-import fontforge
-
-icons = fontforge.font()
-icons.em = 1024
-
-scale = 200
-
-glyph = icons.createChar(0xE001, "ai")
-glyph.importOutlines("/tmp/ai.svg")
-bb = glyph.boundingBox()
-glyph.transform((scale/100.0, 0, 0, scale/100.0, 0, 0))
-glyph.width = 1024
-
-glyph = icons.createChar(0xE002, "syui")
-glyph.importOutlines("/tmp/syui.svg")
-glyph.transform((scale/100.0, 0, 0, scale/100.0, 0, 0))
-glyph.width = 1024
-
-glyph = icons.createChar(0xE003, "bluesky")
-glyph.importOutlines("/tmp/bluesky.svg")
-# center vertically: move to baseline
-bb = glyph.boundingBox()
-yshift = -bb[1]  # move bottom to y=0
-glyph.transform((1, 0, 0, 1, 0, yshift))
-s = scale / 100.0
-glyph.transform((s, 0, 0, s, 0, 0))
-glyph.width = 1024
-
-icons.generate("/tmp/icons.ttf")
-icons.close()
-
-font = fontforge.open("/tmp/MesloLGS NF Regular.ttf")
-font.selection.select(0xE001)
-font.clear()
-font.selection.select(0xE002)
-font.clear()
-font.selection.select(0xE003)
-font.clear()
-font.selection.none()
-
-font.mergeFonts("/tmp/icons.ttf")
-
-font.fontname = "aifont"
-font.familyname = "aifont"
-font.fullname = "aifont"
-font.appendSFNTName("English (US)", "Family", "aifont")
-font.appendSFNTName("English (US)", "SubFamily", "Regular")
-font.appendSFNTName("English (US)", "UniqueID", "aifont-regular")
-font.appendSFNTName("English (US)", "Fullname", "aifont")
-font.appendSFNTName("English (US)", "PostScriptName", "aifont")
-font.appendSFNTName("English (US)", "Preferred Family", "aifont")
-font.appendSFNTName("English (US)", "Preferred Styles", "Regular")
-
-font.generate("/tmp/aifont.ttf")
-font.close()
-print("done: /tmp/aifont.ttf")
-""", check=True)
diff --git a/aifont.ttf b/aifont.ttf
index 2b3a5e7..c69e14b 100644
Binary files a/aifont.ttf and b/aifont.ttf differ
diff --git a/py/arch_cut.py b/py/arch_cut.py
new file mode 100644
index 0000000..65669f7
--- /dev/null
+++ b/py/arch_cut.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env fontforge
+"""
+Apply arch cut to uppercase A-Z and digit 2-9.
+Arch = planet rising from below. The arc curves UPWARD into the bottom of the glyph.
+The cut area is removed (transparent), not filled.
+"""
+import fontforge
+import os
+import math
+
+SRC_DIR = "/tmp/aifont_meslo"
+DST_DIR = "/tmp/aifont_arch"
+os.makedirs(DST_DIR, exist_ok=True)
+
+chars = []
+for c in range(ord('A'), ord('Z')+1):
+    chars.append(chr(c))
+for c in range(ord('0'), ord('9')+1):
+    chars.append(chr(c))
+
+# Skip arch for round-bottom characters
+skip_arch = set()
+
+WIDTH = 602  # Meslo monospace width
+
+workfont = fontforge.font()
+workfont.em = 1000
+workfont.encoding = "UnicodeFull"
+
+for g in chars:
+    cp = ord(g)
+    src = os.path.join(SRC_DIR, g + ".svg")
+    if not os.path.exists(src):
+        continue
+
+    glyph = workfont.createChar(cp, g)
+    glyph.importOutlines(src)
+    glyph.width = WIDTH
+
+    if g not in skip_arch:
+        bb = glyph.boundingBox()
+        xmin, ymin, xmax, ymax = bb
+        h = ymax - ymin
+        w = xmax - xmin
+
+        # How much of the glyph bottom to cut (15%)
+        cut_depth = h * 0.07
+
+        # Large arc radius - the "planet" rising from below
+        # Larger radius = gentler curve
+        radius = w * 2.5
+
+        # The arc center is below the glyph
+        cx = (xmin + xmax) / 2.0
+        # Position so the top of the arc reaches cut_depth into the glyph
+        cy = ymin - radius + cut_depth
+
+        # We need to intersect the glyph with the area ABOVE the arc.
+        # Strategy: create a large clockwise (additive) shape representing
+        # "everything above the arc line", then intersect with the glyph.
+
+        # Step 1: Clear glyph, we'll rebuild via intersection
+        # Save current contours by using a temp approach
+
+        # Better strategy using fontforge:
+        # 1. Create a second glyph with a huge filled area that has the arc as its bottom edge
+        # 2. Use intersect to keep only where glyph and mask overlap
+
+        # Create mask glyph: a large rectangle with arc-shaped bottom
+        mask_cp = 0xE900
+        mask = workfont.createChar(mask_cp, "mask")
+        mask.clear()
+
+        margin = 200
+        left = xmin - margin
+        right = xmax + margin
+        top = ymax + margin
+
+        # The arc: we need points along the arc from left to right
+        # Arc equation: (x - cx)^2 + (y - cy)^2 = radius^2
+        # y = cy + sqrt(radius^2 - (x-cx)^2)  (upper half of circle)
+
+        # Calculate arc endpoints
+        def arc_y(x):
+            dx = x - cx
+            if abs(dx) > radius:
+                return ymin
+            return cy + math.sqrt(radius * radius - dx * dx)
+
+        # Generate points along the arc
+        n_points = 40
+        arc_points = []
+        for idx in range(n_points + 1):
+            x = left + (right - left) * idx / n_points
+            y = arc_y(x)
+            arc_points.append((x, y))
+
+        pen = mask.glyphPen()
+        # Draw clockwise: top-left -> top-right -> arc from right to left -> close
+        pen.moveTo((left, top))
+        pen.lineTo((right, top))
+        # Go down right side to arc start
+        pen.lineTo((right, arc_points[-1][1]))
+        # Follow arc from right to left (reverse order)
+        for idx in range(n_points - 1, -1, -1):
+            pen.lineTo(arc_points[idx])
+        pen.closePath()
+        pen = None
+
+        # Now intersect: keep only the part of glyph inside the mask
+        glyph.correctDirection()
+        mask.correctDirection()
+
+        # Copy mask into glyph's layer and intersect
+        workfont.selection.select(mask_cp)
+        workfont.copy()
+        workfont.selection.select(cp)
+        workfont.pasteInto()
+        glyph.intersect()
+
+        # Clean up mask
+        mask.clear()
+
+    dst = os.path.join(DST_DIR, g + ".svg")
+    glyph.export(dst)
+    print("Done: " + g)
+
+print("\nAll done! Results: " + DST_DIR)
diff --git a/py/build_font.py b/py/build_font.py
new file mode 100644
index 0000000..2c92f61
--- /dev/null
+++ b/py/build_font.py
@@ -0,0 +1,156 @@
+#!/usr/bin/env fontforge
+"""
+Build aifont.ttf:
+- Base: Meslo LGS NF Regular
+- Replace A-Z with arch-cut versions
+- Replace 0-9 with arch-cut versions
+- Replace a, i, o, s with custom ai-world designs
+- Keep everything else (other lowercase, symbols, nerd font icons)
+"""
+import fontforge
+import os
+
+BASE_FONT = "/tmp/MesloLGS NF Regular.ttf"
+UPPER_DIR = "/tmp/aifont_build/upper"
+DIGIT_DIR = "/tmp/aifont_build/digit"
+LOWER_DIR = "/tmp/aifont_build/lower"
+OUTPUT = "/tmp/aifont.ttf"
+
+font = fontforge.open(BASE_FONT)
+
+# Replace uppercase A-Z
+for c in range(ord('A'), ord('Z')+1):
+    g = chr(c)
+    svg = os.path.join(UPPER_DIR, g + ".svg")
+    if os.path.exists(svg):
+        glyph = font[c]
+        w = glyph.width
+        glyph.clear()
+        glyph.importOutlines(svg)
+        glyph.width = w
+        glyph.correctDirection()
+        print("Upper: " + g)
+
+# Replace digits 0-9
+for c in range(ord('0'), ord('9')+1):
+    g = chr(c)
+    svg = os.path.join(DIGIT_DIR, g + ".svg")
+    if os.path.exists(svg):
+        glyph = font[c]
+        w = glyph.width
+        glyph.clear()
+        glyph.importOutlines(svg)
+        glyph.width = w
+        glyph.correctDirection()
+        print("Digit: " + g)
+
+# Replace lowercase a, i, o, s
+# These have different coordinate systems, so center them after import
+import psMat
+
+for g in ['a', 'i']:
+    c = ord(g)
+    svg = os.path.join(LOWER_DIR, g + ".svg")
+    if os.path.exists(svg):
+        glyph = font[c]
+        target_w = glyph.width
+        glyph.clear()
+        glyph.importOutlines(svg)
+        glyph.correctDirection()
+
+        # Get bounding box and center horizontally
+        bb = glyph.boundingBox()
+        xmin, ymin, xmax, ymax = bb
+        glyph_w = xmax - xmin
+        glyph_h = ymax - ymin
+
+        # Scale per glyph
+        if g == 'i':
+            target_h = 1500
+        elif g == 'a':
+            target_h = 1400
+        else:
+            target_h = 1200
+        if glyph_h > 0:
+            scale = target_h / glyph_h
+            glyph.transform(psMat.scale(scale))
+            bb = glyph.boundingBox()
+            xmin, ymin, xmax, ymax = bb
+            glyph_w = xmax - xmin
+
+        # Center horizontally within the glyph width
+        x_offset = (target_w - glyph_w) / 2.0 - xmin
+        # Align baseline
+        y_offset = -ymin
+        glyph.transform(psMat.translate(x_offset, y_offset))
+        glyph.width = target_w
+
+        # Thin down a, o, s (not i) - scale horizontally to 75%
+        if g in ['a', 'o', 's']:
+            bb = glyph.boundingBox()
+            xmin, ymin, xmax, ymax = bb
+            cx = (xmin + xmax) / 2.0
+            # Scale X to 75%, keep Y
+            glyph.transform(psMat.compose(
+                psMat.translate(-cx, 0),
+                psMat.compose(
+                    psMat.scale(0.75, 1.0),
+                    psMat.translate(cx, 0)
+                )
+            ))
+            # Re-center
+            bb = glyph.boundingBox()
+            xmin, ymin, xmax, ymax = bb
+            glyph_w = xmax - xmin
+            x_offset = (target_w - glyph_w) / 2.0 - xmin
+            glyph.transform(psMat.translate(x_offset, 0))
+            glyph.width = target_w
+
+        print("Lower: " + g)
+
+# Re-import custom icons at E001-E003 (same approach as original aifont.py)
+# Build icon font separately, then merge
+ICON_DIR = "/tmp/aifont_build"
+scale = 200  # same as original
+
+icons_font = fontforge.font()
+icons_font.em = 1024
+
+for cp, name, has_yshift in [(0xE001, "ai.svg", False), (0xE002, "syui.svg", False), (0xE003, "bluesky.svg", True)]:
+    svg = os.path.join(ICON_DIR, name)
+    if os.path.exists(svg):
+        glyph = icons_font.createChar(cp, name.replace(".svg", ""))
+        glyph.importOutlines(svg)
+        if has_yshift:
+            bb = glyph.boundingBox()
+            yshift = -bb[1]
+            glyph.transform((1, 0, 0, 1, 0, yshift))
+        s = scale / 100.0
+        glyph.transform((s, 0, 0, s, 0, 0))
+        glyph.width = 1024
+        print("Icon: " + name)
+
+icons_font.generate("/tmp/aifont_icons.ttf")
+icons_font.close()
+
+# Clear existing icon slots and merge
+for cp in [0xE001, 0xE002, 0xE003]:
+    font.selection.select(cp)
+    font.clear()
+font.selection.none()
+font.mergeFonts("/tmp/aifont_icons.ttf")
+
+# Set font metadata
+font.fontname = "aifont"
+font.familyname = "aifont"
+font.fullname = "aifont"
+font.appendSFNTName("English (US)", "Family", "aifont")
+font.appendSFNTName("English (US)", "SubFamily", "Regular")
+font.appendSFNTName("English (US)", "UniqueID", "aifont-regular")
+font.appendSFNTName("English (US)", "Fullname", "aifont")
+font.appendSFNTName("English (US)", "PostScriptName", "aifont")
+font.appendSFNTName("English (US)", "Preferred Family", "aifont")
+font.appendSFNTName("English (US)", "Preferred Styles", "Regular")
+
+font.generate(OUTPUT)
+print("\nDone: " + OUTPUT)
diff --git a/svg/digit/0.svg b/svg/digit/0.svg
new file mode 100644
index 0000000..bb0585b
--- /dev/null
+++ b/svg/digit/0.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" viewBox="-10 0 612 1000">
+   <path fill="currentColor"
+d="M300.781 138.184c-45.8984 0 -80.1592 24.5771 -102.783 73.7305s-33.9355 124.187 -33.9355 225.098c0 45.8984 3.09277 88.8672 9.27734 128.906l227.539 -362.793c-24.7393 -43.2939 -58.1055 -64.9414 -100.098 -64.9414zM300.781 735.84
+c46.2236 0 80.6475 -24.5771 103.271 -73.7305s33.9355 -124.187 33.9355 -225.098c0 -53.7109 -3.25488 -102.214 -9.76562 -145.508l-232.422 363.77c24.4141 53.7109 59.4072 80.5664 104.98 80.5664zM300.781 60.0586c77.7998 0 136.638 31.7383 176.514 95.2148
+s59.8145 157.39 59.8145 281.738s-19.9385 218.262 -59.8145 281.738c-12.4092 19.7539 -26.6553 36.4346 -42.7373 50.041l-2.70703 -0.327148l-21.8037 -2.22754l-21.8047 -1.81836l-21.8047 -1.41309l-21.8037 -1.00781l-21.8037 -0.604492l-21.8047 -0.201172
+l-21.8047 0.201172l-21.8037 0.604492l-21.8037 1.00781l-21.8047 1.41309l-21.8047 1.81836l-21.8037 2.22754l-3.03223 0.366211c-16.0664 -13.6133 -30.2852 -30.3066 -42.6562 -50.0801c-39.7139 -63.4766 -59.5703 -157.39 -59.5703 -281.738
+s19.8564 -218.262 59.5703 -281.738s98.4697 -95.2148 176.27 -95.2148z" />
+</svg>
diff --git a/svg/digit/1.svg b/svg/digit/1.svg
new file mode 100644
index 0000000..7c3fc4e
--- /dev/null
+++ b/svg/digit/1.svg
@@ -0,0 +1,7 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" viewBox="-10 0 612 1000">
+   <path fill="currentColor"
+d="M131.836 717.285h153.32v-550.781l-183.594 88.3789v-94.7266l182.617 -86.9141h98.6328v644.043h151.367v53.5625l-8.1543 -1.68262l-20.8154 -3.87109l-20.8154 -3.45215l-20.8154 -3.03613l-20.8154 -2.625l-20.8154 -2.21582l-20.8154 -1.80957l-20.8154 -1.40527
+l-20.8154 -1.00293l-20.8154 -0.601562l-20.8154 -0.200195l-20.8154 0.200195l-20.8154 0.601562l-20.8154 1.00293l-20.8154 1.40527l-20.8154 1.80957l-20.8154 2.21582l-20.8154 2.625l-20.8154 3.03613l-19.5117 3.23535v-47.792z" />
+</svg>
diff --git a/svg/digit/2.svg b/svg/digit/2.svg
new file mode 100644
index 0000000..20fe9e8
--- /dev/null
+++ b/svg/digit/2.svg
@@ -0,0 +1,10 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" viewBox="-10 0 612 1000">
+   <path fill="currentColor"
+d="M182.129 716.797h334.961v53.4775l-10.7178 -2.18555l-21.0713 -3.87402l-21.0723 -3.45508l-21.0723 -3.03906l-21.0713 -2.62695l-21.0713 -2.21777l-21.0723 -1.81152l-21.0723 -1.40723l-21.0713 -1.00293l-21.0713 -0.602539l-21.0723 -0.200195l-21.0723 0.200195
+l-21.0713 0.602539l-21.0713 1.00293l-21.0723 1.40723l-21.0723 1.81152l-21.0713 2.21777l-21.0713 2.62695l-21.0723 3.03906l-21.0723 3.45508l-21.0713 3.87402l-10.7178 2.18555v-53.4775c60.8721 -64.1279 114.095 -120.769 159.668 -169.922
+s76.9854 -83.8213 94.2383 -104.004c32.5518 -39.7139 54.5244 -71.8584 65.918 -96.4355s17.0898 -49.7236 17.0898 -75.4395c0 -40.6904 -11.9629 -72.5908 -35.8887 -95.7031s-56.7217 -34.668 -98.3887 -34.668c-29.6221 0 -60.71 5.37109 -93.2617 16.1133
+s-67.0576 27.0186 -103.516 48.8281v-99.6094c33.5283 -15.9502 66.4873 -27.9951 98.877 -36.1328s64.3721 -12.207 95.9473 -12.207c71.2891 0 128.662 18.9619 172.119 56.8848s65.1855 87.6465 65.1855 149.17c0 31.25 -7.24316 62.5 -21.7285 93.75
+s-38.0049 65.7549 -70.5566 103.516c-18.2295 21.1592 -44.6777 50.4561 -79.3457 87.8906s-87.4834 93.4248 -158.447 167.969z" />
+</svg>
diff --git a/svg/digit/3.svg b/svg/digit/3.svg
new file mode 100644
index 0000000..db41e16
--- /dev/null
+++ b/svg/digit/3.svg
@@ -0,0 +1,11 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" viewBox="-10 0 612 1000">
+   <path fill="currentColor"
+d="M378.906 409.668c47.8516 12.6953 84.4727 35.2373 109.863 67.627s38.0859 72.835 38.0859 121.338c0 67.0576 -22.542 119.71 -67.627 157.959c-5.69434 4.83105 -11.666 9.35742 -17.9131 13.5781l-15.4463 -1.8916l-21.499 -2.22266l-21.499 -1.81543
+l-21.499 -1.40918l-21.499 -1.00684l-21.499 -0.602539l-21.499 -0.201172l-21.499 0.201172l-21.499 0.602539l-21.499 1.00684l-21.499 1.40918l-21.499 1.81543l-21.499 2.22266l-21.499 2.63281l-21.499 3.04492l-21.499 3.46094l-21.499 3.87988l-2.99609 0.599609
+c-4.00781 -1.31543 -8.00586 -2.66992 -11.9941 -4.06445v-98.1445c33.2031 17.2529 65.918 30.1104 98.1445 38.5742s64.29 12.6953 96.1914 12.6953c54.0361 0 95.54 -12.207 124.512 -36.6211s43.457 -59.5703 43.457 -105.469
+c0 -42.3174 -14.4854 -75.9277 -43.457 -100.83s-68.1963 -37.3535 -117.676 -37.3535h-75.1953v-81.0547h75.1953c45.2471 0 80.5664 -9.92871 105.957 -29.7852s38.0859 -47.5264 38.0859 -83.0078c0 -37.4346 -11.7998 -66.1621 -35.4004 -86.1816
+s-57.21 -30.0293 -100.83 -30.0293c-28.9717 0 -58.9189 3.25488 -89.8438 9.76562s-63.3135 16.2764 -97.168 29.2969v-90.8203c39.3877 -10.417 74.4629 -18.2295 105.225 -23.4375s58.0244 -7.8125 81.7871 -7.8125c70.9639 0 127.686 17.8223 170.166 53.4668
+s63.7207 82.9268 63.7207 141.846c0 40.0391 -11.1494 73.4053 -33.4473 100.098s-54.7686 45.5732 -97.4121 56.6406z" />
+</svg>
diff --git a/svg/digit/4.svg b/svg/digit/4.svg
new file mode 100644
index 0000000..1b50021
--- /dev/null
+++ b/svg/digit/4.svg
@@ -0,0 +1,6 @@
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd" >
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" viewBox="-10 0 612 1000">
+   <path fill="currentColor"
+d="M342.773 70.8008h114.258v475.098h97.168v80.0781h-97.168v132.39l-19.3701 -2.27344l-22.6104 -2.24023l-22.6094 -1.83105l-22.6094 -1.42188l-10.9453 -0.490234v-124.133h-309.082v-93.2617zM358.887 160.645l-229.98 385.254h229.98v-385.254z" />
+</svg>
diff --git a/svg/digit/5.svg b/svg/digit/5.svg
new file mode 100644
index 0000000..c2fbd33
--- /dev/null
+++ b/svg/digit/5.svg
@@ -0,0 +1,10 @@
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diff --git a/svg/digit/6.svg b/svg/digit/6.svg
new file mode 100644
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+++ b/svg/digit/6.svg
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diff --git a/svg/digit/7.svg b/svg/digit/7.svg
new file mode 100644
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+++ b/svg/digit/7.svg
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diff --git a/svg/digit/8.svg b/svg/digit/8.svg
new file mode 100644
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diff --git a/svg/digit/9.svg b/svg/digit/9.svg
new file mode 100644
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diff --git a/svg/digit/Q.svg b/svg/digit/Q.svg
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+++ b/svg/digit/Q.svg
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diff --git a/svg/digit/U.svg b/svg/digit/U.svg
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+++ b/svg/digit/U.svg
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diff --git a/svg/lower/a.svg b/svg/lower/a.svg
new file mode 100644
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+++ b/svg/lower/a.svg
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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 850" width="1024" height="850">
+  <path fill-rule="evenodd" fill="#000000" d="
+    M 619,232
+    L 512,7
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diff --git a/svg/lower/i.svg b/svg/lower/i.svg
new file mode 100644
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--- /dev/null
+++ b/svg/lower/i.svg
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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 2400" width="1024" height="2400">
+  <!-- dot: ai mark scaled down 50%, centered -->
+  <g transform="translate(512,200) scale(0.5) translate(-512,-400)">
+    <path fill="#000000" d="
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+      Z
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+  </g>
+  <!-- bar: vertical stroke (wider, longer) -->
+  <rect x="352" y="650" width="320" height="1700" rx="20" fill="#000000"/>
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diff --git a/svg/lower/o.svg b/svg/lower/o.svg
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+++ b/svg/lower/o.svg
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+  <!-- 0: the circle, void, beginning, off -->
+  <path d="
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+    C 900 726 726 900 512 900
+    C 298 900 124 726 124 512
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diff --git a/svg/lower/s.svg b/svg/lower/s.svg
new file mode 100644
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+++ b/svg/lower/s.svg
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diff --git a/svg/upper/0.svg b/svg/upper/0.svg
new file mode 100644
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diff --git a/svg/upper/6.svg b/svg/upper/6.svg
new file mode 100644
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+++ b/svg/upper/6.svg
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new file mode 100644
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--- /dev/null
+++ b/svg/upper/Z.svg
@@ -0,0 +1,8 @@
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