Problem: MRMCD12 every other char

Code: MRMCD12+every+other+char/tails_1645792843

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)

`% (step) 
    ~ (auto = 2) 
    @ (= fstLine)