import java.util.*;

public class Main {
 	public static void main(String[] args) {
      
      Scanner sc = new Scanner(System.in);
      
      String str; 
      str = sc.next();
      
      int leng = str.length();
      int idx = 0;
      
   	  while(leng > idx) {
        	System.out.print("x");
        idx++;
      }

	}
}
/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