import java.util.Scanner;
public class Main {	
	public static void main(String[] args) {
		Scanner frog = new Scanner(System.in);
		String S = frog.next();
		int i = S.length();
		for(int x = 0;x<i;x++) {
			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