Problem: Print line number prefix
Code: Print+line+number+prefix/tails_1645185928
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)
`r (read int) @ (= fstLine)