# code: http://golf.shinh.org/reveal.rb?decode+pressure/tails_1642554323&nbb
# target Nibbles version: 0.23
# commenter version: 0.1.2.181

: #(append):[chr] 
    / #(divide):int 
        520 #(integer):int 
        / #(foldr1):chr 
            @ #(= fstLine):[chr] 
            $ #(= B):chr <--arg( B:chr A:chr ) 
    * #(join):[chr] 
        "." #(string):[chr] 
        `/ #(chunks of):[[chr]] 
            ~ #(auto = 2):auto 
            @ #(= fstLine):[chr]