# code: http://golf.shinh.org/reveal.rb?number+stairs/tails_1723684389&nbb
# target Nibbles version: 1.00
# commenter version: 0.1.6.187

#(implicit map with implicit range):[[[int]]] 
    9 #(integer):int 
    : #(append):[[int]] <--arg( B:int A:int ) 
        , #(range from 1):[int] 
            $ #(= B):int 
        ~ #(auto = []):auto