# code: http://golf.shinh.org/reveal.rb?word+block/tails_1645538942&nbb
# target Nibbles version: 0.23
# commenter version: 0.1.2.181

#(implicit map with implicit range):[[chr]] 
    fstInt #($):int 
    \B A 
    \ #(reverse):[chr] 
        >~ #(drop while):[chr] 
            \ #(reverse):[chr] 
                * #(join):[chr] 
                    " " #(string):[chr] 
                    . #(map):[[chr]] 
                        % #(split (remove empties)):[[chr]] 
                            fstLine #(;$):[chr] 
                            ~ #(auto = words):auto 
                        \C 
                        ? #(if/else):[chr] 
                            - #(subtract):int 
                                B #(@):int 
                                , #(length):int 
                                    C #($):[chr] 
                            \D 
                            . #(map):[chr] 
                                C #(@):[chr] 
                                \E 
                                ' ' #(char):chr 
                            C #($):[chr] 
            ~ #(not):null 
            #\F 
            #(implicit arg = F):chr