# code: http://golf.shinh.org/reveal.rb?Not+Pascal+Triangle/tails_1646627194&nbb
# target Nibbles version: 0.25
# commenter version: 0.1.2.181

< #(take):[[int]] 
    20 #(integer):int 
    | #(filter):[[int]] 
        `. #(iterate while uniq):[[int]] 
            _ #(= ints):[int] 
            ! #(zip with):[int] <--arg( A:[int] ) 
                : #(append):[int] 
                    1 #(integer):int 
                    \ #(reverse):[int] 
                        $ #(= A):[int] 
                : #(append):[int] <--arg( B:int ) 
                    \ #(reverse):[int] 
                        @ #(= A):[int] 
                    0 #(integer):int 
                + #(zipop: add):null 
        #(implicit arg = C):[int] <--arg( C:[int] )