# code: http://golf.shinh.org/reveal.rb?Permutations/tails+%28v1.00%29_1656496703&nbb
# target Nibbles version: 0.23
# commenter version: 0.1.2.181

\ #(reverse):[int] 
    + #(add):[int] 
        ~ #(auto = 1):auto 
        `, #(range from 0):[int] 
            6 #(integer):int