Problem: TeX catcode

Code: TeX+catcode/tails_1657864520

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)

. (map):[int] 
    @ (= fstLine):[chr] 
    ? (if/else):int <--arg( A:chr ) 
        ? (index):int 
            "\\{}$&\\#^_\\ \\\\~%" (string):[chr] 
            $ (= A):chr 
        - (subtract):int <--arg( B:int ) 
            $ (= B):int 
            ~ (auto = 1):auto 
        - (subtract):int 
            12 (integer):int 
            , (length):int 
                \ (char class):[chr] 
                    $ (= A):chr 
                    a (isAlpha):null