# code: http://golf.shinh.org/reveal.rb?Pragraph+counter/tails_1645663218&nbb
# target Nibbles version: 0.23
# commenter version: 0.1.2.181

, #(length):int 
    | #(filter):[[chr]] 
        ;;@ #(= allLines):[[chr]] 
        #(implicit arg = A):[chr] <--arg( A:[chr] )