import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String S = sc.next();
		int Length=S.length();
      	char tmp[];
      	tmp =new char[Length];
      	for(int i=0 ;i<Length;i++)
        {
          	tmp[i]='x';
        }
      	System.out.println(tmp);
	}
}
/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