import java.util.Scanner;


public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String line2 = sc.nextLine();
      
      	if(line2.contains(line)){
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        }else{
          	System.out.println("No");
        }

    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String line2 = sc.nextLine();
      
      	if(line2.contains(line)){
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        }else{
          	System.out.println("No");
        }

    }
} Main public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String line2 = sc.nextLine();
      
      	if(line2.contains(line)){
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        }else{
          	System.out.println("No");
        }

    } main {

        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String line2 = sc.nextLine();
      
      	if(line2.contains(line)){
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        }else{
          	System.out.println("No");
        }

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String line = sc.nextLine(); line sc.nextLine() sc.nextLine sc String line2 = sc.nextLine(); line2 sc.nextLine() sc.nextLine sc if(line2.contains(line)){
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        }else{
          	System.out.println("No");
        } line2.contains(line) line2.contains line2 line {
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        } if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		} line.charAt(0) == line2.charAt(0) line.charAt(0) line.charAt line 0 line2.charAt(0) line2.charAt line2 0 {
      			System.out.println("Yes");
      		} System.out.println("Yes") System.out.println System.out System System.out "Yes" {
      			System.out.println("No");
      		} System.out.println("No") System.out.println System.out System System.out "No" {
          	System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String line2 = sc.nextLine();
      
      	if(line2.contains(line)){
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        }else{
          	System.out.println("No");
        }

    }
} public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String line2 = sc.nextLine();
      
      	if(line2.contains(line)){
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        }else{
          	System.out.println("No");
        }

    }
} Main
import java.util.Scanner;


public class Main {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        String line = sc.nextLine();
        String line2 = sc.nextLine();
      
      	if(line2.contains(line)){
      		if(line.charAt(0) == line2.charAt(0)){
      			System.out.println("Yes");
      		}else{
      			System.out.println("No");
      		}
        }else{
          	System.out.println("No");
        }

    }
}