	import java.util.*;
	
	
	
	public class Main {
	
		public static void main(String[] args) {
		
			Scanner sc = new Scanner(System.in);
			
			String S = sc.next();
			int L = S.length();
			StringBuilder buf = new StringBuilder();
			
			for (int i = 0;i<L;i++) {
				buf.append("x");
			}
			
			String res = buf.toString();
			
			System.out.println(res);
		}
		
		
	}
/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