# code: http://golf.shinh.org/reveal.rb?MRMCD12+every+other+char/tails_1645792843&nbb
# target Nibbles version: 0.24
# commenter version: 0.1.2.181

`% #(step):[chr] 
    ~ #(auto = 2):auto 
    @ #(= fstLine):[chr]