import java.util.Scanner;
 
public class Main {
    public static void main(String[] args) {
      Scanner scan = new Scanner(System.in);
	  String str = scan.next();      
      int count = str.length();

      for(int i =0; i < count; i++){
		System.out.print("x");
      }
      
    }
}
/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