Problem: mysterious numbers

Code: mysterious+numbers/tails+%28whio%29_1771402494

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)

or (or) 
    / (foldr) 
        _ (= ints) 
        | (filter) <--arg( B A ) 
            ;@ (= ints) 
            - (subtract) <--arg( C ) 
                $ (= C) 
                ~ (auto = 1) 
        `% (split list (keep empties)) <--arg( E D ) 
            @ (= D) 
            : (append) 
                + (add) 
                    % (modulus) 
                        $ (= E) 
                        3 (integer) 
                    3 (integer) 
                2 (integer) 
    1 (integer) <--arg( F )