# Experimental!
P₁   ← /+⊜⋕⊸∊⊂@-+@0⇡10
Leaf ← ⨬(¤/+|¤0|⨬([]|[]|[0])+⊃(¬≍⍉⊸⍉|˜∊□"red"))⊸type
P₂   ← recur(◇Leaf|◇(⍉⍉)|◇/+)°json
⊃P₂P₁&fras"i/12.in"

~/aoc15ua/12