import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String str = sc.nextLine();
		String[] arr = str.split(" ");
		String str1 = arr[0].replace(arr[1].charAt(0), arr[2].charAt(0));
		System.out.println(str1);
	}

}
/**************************************************************
	Problem: 1570
	User: admin
	Language: Java
	Result: Accepted
	Time:1529 ms
	Memory:40152 kb
****************************************************************/