import java.util.Scanner;
public class Main {
  public static void main( String[] args ) {
	  Scanner scan = new Scanner(System.in);
	  String S = scan.next();
	  int strLen = S.length();
	  String ans = "";
	  for( int i = 0; i < strLen; i++ )ans += "x";
	  System.out.println(ans);
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz