# code: http://golf.shinh.org/reveal.rb?mysterious+numbers/tails+%28whio%29_1771402494&nbb
# target Nibbles version: 1.00
# commenter version: 0.1.6.187

or #(or):[int] 
    / #(foldr):[int] 
        ints #(_):[int] 
        \B A 
        | #(filter):[int] 
            ints #(;@):[int] 
            \C 
            - #(subtract):int 
                C #($):int 
                ~ #(auto = 1):auto 
        \E D 
        `% #(split list (keep empties)):[[int]] 
            D #(@):[int] 
            : #(append):[int] 
                + #(add):int 
                    % #(modulus):int 
                        E #($):int 
                        3 #(integer):int 
                    3 #(integer):int 
                2 #(integer):int 
    \F 
    1 #(integer):int