1 &fras ⊣ &args 2 3 ⊜≡⋕⊸≠@\n 4 5 Neigh ← ▽=+1⊸⊢:⟜⬚0⊡+⊂0[◡∩¯⟜⇌⇡2]¤ 6 ∩/+≡(∩⧻⟜◴≡◇⊣path(Neigh|=9⊡))⊚=0⟜¤