import java.util.*;
public class Niz15{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		System.out.print("Vnesi stavek ");
		String stavek = sc.nextLine();
		String besede[] = stavek.split(" ");
		for (int i = 0; i<besede.length; i++)
			besede[i] = 'x' + besede[i].substring(1);
		String nov = String.join(" ",besede);
		
		System.out.println(nov);
	}
}