# code: http://golf.shinh.org/reveal.rb?repeated+permutation/tails_1645003031&nbb
# target Nibbles version: 0.23
# commenter version: 0.1.2.181

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