# code: http://golf.shinh.org/reveal.rb?Hard+Exercise/tails_1673838928&nbb
# target Nibbles version: 1.00
# commenter version: 0.1.2.181

`/ #(chunks of):[[int]] 
    3 #(integer):int 
    ! #(zip with):[int] 
        ; #(save):[int] 
            ^ #(replicate):[int] 
                3 #(integer):int 
                , #(range from 1):[int] 
                    3 #(integer):int 
        sets A 
        \B 
        `< #(sort):[int] 
            A #(@):[int] 
        ~ #(zipop: by):null 
        \D C 
        = #(subscript (wrapped)):int 
            `# #(hashmod):int 
                fstLine #(;@):[chr] 
                7 #(hashmod arg):null 
            : #(append):[int] 
                D #($):int 
                : #(append):[int] 
                    C #(@):int 
                    + #(add):int 
                        C #(@):int 
                        #(implicit arg = D):int 
#(postdata (hex): hashmod)
0