import java.util.Scanner;

public class Main {
	    public static void main(String[] args) {
	        Scanner scan = new Scanner(System.in);
	        String str = scan.next();
	        scan.close();

	        StringBuilder strAfter = new StringBuilder();
			for(int i=0; i<str.length(); i++) {
				 strAfter.append("x");
			}

          	System.out.print(strAfter);
    }
}

/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