# code: http://golf.shinh.org/reveal.rb?TeX+catcode/tails_1657864520&nbb
# target Nibbles version: 1.00
# commenter version: 0.1.2.181

. #(map):[int] 
    @ #(= fstLine):[chr] 
    ? #(if/else):int <--arg( A:chr ) 
        ? #(index):int 
            "\\{}$&\\#^_\\ \\\\~%" #(string):[chr] 
            $ #(= A):chr 
        - #(subtract):int <--arg( B:int ) 
            $ #(= B):int 
            ~ #(auto = 1):auto 
        - #(subtract):int 
            12 #(integer):int 
            , #(length):int 
                \ #(char class):[chr] 
                    $ #(= A):chr 
                    a #(isAlpha):null