import java.util.ArrayList;
import java.util.Scanner;

public class Main {
static Scanner sc = new Scanner(System.in);
static ArrayList<String> strList = new ArrayList<String>();
static ArrayList<String> intList2 = new ArrayList<String>();
public static void main(String[] args) {

        String str = sc.nextLine();

        for(int i = 0; i < str.length(); i++){

            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