Input ← &fras "../day_01.txt"
Lines ← ⊜□≠, @\n Input

Digits ← +@1⇡9
CalibrationValue ← /+ ×[10 1] -@0 ⊏0_¯1 ▽ ≡/+ ∵(⌕:Digits).

/+ ∵(CalibrationValue ⊔) Lines