Problem: code golf meetup 2025

Code: code+golf+meetup+2025/whio_1749502772

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)

+ (concat):[chr] 
    . (map):[[chr]] 
        `= (chunk by):[[chr]] 
            @ (= fstLine):[chr] 
            $ (= A):chr <--arg( A:chr ) 
        > (drop):[chr] <--arg( B:[chr] ) 
            - (subtract):int 
                ~ (auto = 1):auto 
                , (length):int 
                    $ (= B):[chr] 
            : (append):[chr] 
                (implicit arg = B):[chr] 
                (implicit arg = B):[chr]