# code: http://golf.shinh.org/reveal.rb?Guess+what+it+does/tails_1646492097&nbb
# target Nibbles version: 0.25
# commenter version: 0.1.2.181

: #(append):[[int]] 
    : #(append):[int] 
        \ #(reverse):[int] 
            ; #(save):[int] 
                : #(append):[int] 
                    `, #(range from 0):[int] 
                        13 #(integer):int 
                    + #(add):[int] 
                        19 #(integer):int 
                        , #(range from 1):[int] 
                            237 #(integer):int 
            sets A 
        A #($):[int] 
    ~ #(auto = []):auto