import java.util.*;
public class Main {
	public static void main(String[] args){
      	//データ取り込み
		Scanner sc = new Scanner(System.in);
		String word_before = sc.next();
		//int N = sc.nextInt();
      	//String word_arr[] = new String[N];
		String word_after = word_before.replaceAll("[0-9a-z]", "x");
		System.out.println(word_after);
      	
    }
		
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
      	//データ取り込み
		Scanner sc = new Scanner(System.in);
		String word_before = sc.next();
		//int N = sc.nextInt();
      	//String word_arr[] = new String[N];
		String word_after = word_before.replaceAll("[0-9a-z]", "x");
		System.out.println(word_after);
      	
    }
		
} Main public static void main(String[] args){
      	//データ取り込み
		Scanner sc = new Scanner(System.in);
		String word_before = sc.next();
		//int N = sc.nextInt();
      	//String word_arr[] = new String[N];
		String word_after = word_before.replaceAll("[0-9a-z]", "x");
		System.out.println(word_after);
      	
    } main {
      	//データ取り込み
		Scanner sc = new Scanner(System.in);
		String word_before = sc.next();
		//int N = sc.nextInt();
      	//String word_arr[] = new String[N];
		String word_after = word_before.replaceAll("[0-9a-z]", "x");
		System.out.println(word_after);
      	
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String word_before = sc.next(); word_before sc.next() sc.next sc String word_after = word_before.replaceAll("[0-9a-z]", "x"); word_after word_before.replaceAll("[0-9a-z]", "x") word_before.replaceAll word_before "[0-9a-z]" "x" System.out.println(word_after) System.out.println System.out System System.out word_after String[] args args public class Main {
	public static void main(String[] args){
      	//データ取り込み
		Scanner sc = new Scanner(System.in);
		String word_before = sc.next();
		//int N = sc.nextInt();
      	//String word_arr[] = new String[N];
		String word_after = word_before.replaceAll("[0-9a-z]", "x");
		System.out.println(word_after);
      	
    }
		
} public class Main {
	public static void main(String[] args){
      	//データ取り込み
		Scanner sc = new Scanner(System.in);
		String word_before = sc.next();
		//int N = sc.nextInt();
      	//String word_arr[] = new String[N];
		String word_after = word_before.replaceAll("[0-9a-z]", "x");
		System.out.println(word_after);
      	
    }
		
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
      	//データ取り込み
		Scanner sc = new Scanner(System.in);
		String word_before = sc.next();
		//int N = sc.nextInt();
      	//String word_arr[] = new String[N];
		String word_after = word_before.replaceAll("[0-9a-z]", "x");
		System.out.println(word_after);
      	
    }
		
}