Problem: repeated permutation

Code: repeated+permutation/tails_1645003031

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)

`* (nary cartesian product) 
    . (map) 
        , (range from 1) 
            ;$ (= sndInt) 
        , (range from 1) <--arg( A ) 
            @ (= fstInt)