# code: http://golf.shinh.org/reveal.rb?An+ineffective+skyscraper/tails_1717373772&nbb
# target Nibbles version: 0.25
# commenter version: 0.1.6.187

`. #(iterate while uniq):[[chr]] 
    ^ #(replicate):[chr] 
        81 #(integer):int 
        "-" #(string):[chr] 
    \A 
    : #(append):[chr] 
        ; #(save):[chr] 
            `% #(step):[chr] 
                3 #(integer):int 
                A #($):[chr] 
        sets B 
        & #(justify):[chr] 
            " " #(string):[chr] 
            , #(length):int 
                : #(append):[chr] 
                    #(implicit arg = B):[chr] 
                    #(implicit arg = B):[chr] 
            #(implicit arg = B):[chr]