# code: http://golf.shinh.org/reveal.rb?fuzzy+logic/tails_1700140833&nbb
# target Nibbles version: 1.00
# commenter version: 0.1.2.181

= #(subscript (wrapped)):chr 
    2 #(integer):int 
    + #(concat):[chr] 
        =~ #(group by (also sorts)):[[chr]] 
            fstLine #(@):[chr] 
            \A 
            ``@ #(to bits):[int] 
                - #(subtract):chr 
                    A #($):chr 
                    ~ #(auto = 1):auto