diff --git a/2025/day09.ua b/2025/day09.ua
new file mode 100644
index 0000000..16bdd09
--- /dev/null
+++ b/2025/day09.ua
@@ -0,0 +1,9 @@
+~ "aoc.ua" ~ Lines
+
+Lines &fras "input/day09.txt"
+
+Area ← /×+1⌵-°⊟
+
+≡◇(⊜⋕ ⊸≠@,)
+⊏ ⧅< 2 °⊏
+/↥≡Area