# code: http://golf.shinh.org/reveal.rb?different+letters+parity/tails_1642076932&nbb
# target Nibbles version: 0.21
# commenter version: 0.1.2.181

% #(modulus):int 
    , #(length):int 
        `$ #(uniq):[chr] 
            fstLine #(@):[chr] 
    ~ #(auto = 2):auto