# code: http://golf.shinh.org/reveal.rb?Aegilops/tails_1645445427&nbb
# target Nibbles version: 0.23
# commenter version: 0.1.2.181

: #(append):[[[chr]]] 
    | #(filter):[[chr]] 
        % #(split (remove empties)):[[chr]] 
            @ #(= fstLine):[chr] 
            ~ #(auto = words):auto 
        == #(equal?):int <--arg( A:[chr] ) 
            ; #(save):[chr] -->let( C:[chr] ) 
                . #(map):[chr] 
                    $ #(= A):[chr] 
                    `( #(to lowercase):chr <--arg( B:chr ) 
                        $ #(= B):chr 
            `< #(sort):[chr] <--arg( D:[chr] ) 
                @ #(= C):[chr] 
    ~ #(auto = []):auto