program Project1;

{$APPTYPE CONSOLE}

uses
  SysUtils;
var finput,foutput:textfile; line:string;
begin
assign(finput,'input.txt');
reset(finput);
readln(finput,line);
assign(foutput,'output.txt');
rewrite(foutput);
writeln(foutput,'xz');
close(foutput);
end.
