# code: http://golf.shinh.org/reveal.rb?arrays+start+at+a/kaki_1735488735&nbb
# target Nibbles version: 0.22
# commenter version: 0.1.6.187

= #(subscript (wrapped)):chr 
    - #(subtract):int 
        / #(foldr1):chr 
            ; #(let):[chr] -->let( B:[chr] ) 
                | #(filter):[chr] 
                    @ #(= fstLine):[chr] 
                    \ #(char class):[chr] <--arg( A:chr ) 
                        $ #(= A):chr 
                        a #(isAlpha):null 
            @ #(= C):chr <--arg( D:chr C:chr ) 
        '`' #(char):chr 
    #(implicit arg = B):[chr]