diff --git a/day03.ua b/day03.ua
new file mode 100644
index 0000000..6881811
--- /dev/null
+++ b/day03.ua
@@ -0,0 +1,35 @@
+$ 467..114..
+$ ...*......
+$ ..35..633.
+$ ......#...
+$ 617*......
+$ .....+.58.
+$ ..592.....
+$ ......755.
+$ ...$.*....
+$ .664.598..
+TestInput ←
+Table ← ⊜(⊂:@.)≠@\n.
+
+Adjacency ← ↯¯1_2-1⇡3_3
+Numbers ← ⊜parse×⊃(≤@9|≥@0).♭
+Classify ← ⍜(♭|⍜(⊜□|⊐≡(↯⧻)⊃(∘|+@\x80⇡⧻))×⊃(≤@9|≥@0).)
+
+PartI ← (
+  ×⊃(<@\x80|≠@.|∘)
+  ≡(↥↥⬚0⊃(↻1|↻¯1|∘))↥↥⬚0⊃(↻1|↻¯1|∘)
+  /+⊏-@\x80⊝▽≥@\x80.▽∩♭
+)
+
+PartII ← (
+  ⊚=@*.
+  ⊠+:Adjacency
+  ≡(□⊝▽≥@\x80.≡(⊡)⊙¤)⊙¤
+  /+≡(/×⊏-@\x80⊔)⊙¤▽=2≡⧻.
+)
+
+⊃(Classify|Numbers) Table TestInput
+⊃(PartI|PartII)
+
+⊃(Classify|Numbers) Table &fras "day03.in"
+⊃(PartI|PartII)