import java.util.*;
import java.util.Comparator;

public class Main { 
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);       
        String s=sc.next();
        int l=s.length();
        String o="";
        for(int i=0;i<l;i++){
        	o=o+"x";
        }
      System.out.println(o);
    }
}
/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