import java.util.Arrays;
import java.util.Scanner;
public class Main {

public static void main(String[] args) {
		Scanner input= new Scanner(System.in);
		String st=input.next();
		int a = st.length();
		String n ="";
		int i=0;
		while (i < a) {
		n +="x";
		i++;
		
			
		
		}	
		System.out.println(n);
}
}
/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