# code: http://golf.shinh.org/reveal.rb?The+Worst+Error+Correction+Method/tails_1651228315&nbb
# target Nibbles version: 0.25
# commenter version: 0.1.2.181

#(implicit map):[chr] 
    `' #(transpose):[[chr]] 
        ;@ #(= allLines):[[chr]] 
    = #(subscript (wrapped)):chr <--arg( B:[chr] A:[chr] ) 
        10 #(integer):int 
        `< #(sort):[chr] 
            $ #(= B):[chr]