import java.util.*;
 
public class Main
{
  public static void main(String[] args)
  {
    Scanner scan1 = new Scanner(System.in);
    String input = scan1.next();
    String output = "";
    
    for(int i = 0; i < input.length(); i++)
    {
      output += "x";
    }
    
    System.out.println(output);
  }
}
/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