# code: http://golf.shinh.org/reveal.rb?Counting+Adventure+10/tails_1642137528&nbb
# target Nibbles version: 0.21
# commenter version: 0.1.2.181

`* #(nary cartesian product):[[chr]] 
    . #(map):[[chr]] 
        , #(range from 1):[int] 
            fstInt #($):int 
        \A 
        ".#" #(string):[chr]