Problem: odd lines

Code: odd+lines/tails_1642043759

Nibbles version: 0.2 | 0.21 | 0.22 | 0.23 | 0.24 | 0.25 | 1.00

Format: Compact | Simple | +Type | Table | JSON | .nbl (DeBruijn) | .nbl (names)

(implicit string concatenation) 
    ^ (replicate) 
        0 (integer) 
        ;@ (= sndLine) 
    @ (= fstLine)