Problem: Fill in the blanks

Code: Fill+in+the+blanks/tails_1645664315

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] 
    ! (zip with):[[chr]] 
        `% (split list (keep empties)):[[chr]] 
            > (drop):[chr] 
                + (add):int 
                    , (length):int 
                        @ (= fstLine):[chr] 
                    ~ (auto = 1):auto 
                ;_ (= allInput):[chr] 
            "_" (string):[chr] 
        : (append):[chr] <--arg( A:[chr] ) 
            _ (= fstLine):[chr] 
            "\n" (string):[chr] 
        : (zipop: cons):null