import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
        
        if(a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0)){
            System.out.println("No");
        }else if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
        
        if(a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0)){
            System.out.println("No");
        }else if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
        
        if(a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0)){
            System.out.println("No");
        }else if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
        
        if(a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0)){
            System.out.println("No");
        }else if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String a = sc.next(); a sc.next() sc.next sc String b = sc.next(); b sc.next() sc.next sc String c = sc.next(); c sc.next() sc.next sc if(a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0)){
            System.out.println("No");
        }else if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        } a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0) a.charAt(0)==b.charAt(0) a.charAt(0) a.charAt a 0 b.charAt(0) b.charAt b 0 b.charAt(0) == c.charAt(0) b.charAt(0) b.charAt b 0 c.charAt(0) c.charAt c 0 {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        } a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0) a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0) a.charAt(0) != b.charAt(0) a.charAt(0) a.charAt a 0 b.charAt(0) b.charAt b 0 a.charAt(0) != c.charAt(0) a.charAt(0) a.charAt a 0 c.charAt(0) c.charAt c 0 b.charAt(0) != c.charAt(0) b.charAt(0) b.charAt b 0 c.charAt(0) c.charAt c 0 {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" String[] args args public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
        
        if(a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0)){
            System.out.println("No");
        }else if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
        
        if(a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0)){
            System.out.println("No");
        }else if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
} Main
import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
        
        if(a.charAt(0)==b.charAt(0) && b.charAt(0) == c.charAt(0)){
            System.out.println("No");
        }else if(a.charAt(0) != b.charAt(0) && a.charAt(0) != c.charAt(0) && b.charAt(0) != c.charAt(0)){
            System.out.println("No");
        }else{
            System.out.println("Yes");
        }
    }
}