# code: http://golf.shinh.org/reveal.rb?combination/tails_1642138544&nbb
# target Nibbles version: 0.21
# commenter version: 0.1.2.181

`_ #(subsequences):[[int]] 
    ;$ #(= sndInt):int 
    , #(range from 1):[int] 
        $ #(= fstInt):int