# code: http://golf.shinh.org/reveal.rb?stratum/tails_1642068163&nbb
# target Nibbles version: 0.21
# commenter version: 0.1.2.181

. #(map):[[chr]] 
    `\ #(special scans):[[chr]] 
        \ #(reverse):[chr] 
            @ #(= fstLine):[chr] 
        : #(foldop: cons):null 
    : #(append):[chr] <--arg( A:[chr] ) 
        \ #(reverse):[chr] 
            #(implicit arg = A):[chr] 
        #(implicit arg = A):[chr]