Problem: uwu 2

Code: uwu+2/whio_1752185594

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)

* (join) 
    "u" (string) 
    + (concat) 
        . (map) 
            %~ (split by) 
                @ (= fstLine) 
                ? (index) <--arg( A ) 
                    "w" (string) 
                    $ (= A) 
            : (append) <--arg( C B ) 
                @ (= B) 
                `' (transpose) 
                    $ (= C)