import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int a = sc.nextInt();
        int b = sc.nextInt();
        int[] mods = new int[10];
        int idx = 0;
        int value = 1000000000;
        while (idx < 10) {
            if (isPrime(value)) {
                mods[idx++] = value;
            }
            value++;
        }
        for (int i = 0; i < 10; i++) {
            if (powmod(a, b, mods[i]) != powmod(b, a, mods[i])) {
                System.out.println("No");
                return;
            }
        }
        System.out.println("Yes");
    }
    
    static long powmod(long x, int p, int mod) {
        if (p == 0) {
            return 1;
        } else if (p % 2 == 0) {
            return powmod(x * x % mod, p / 2, mod);
        } else {
            return powmod(x, p - 1, mod) * x % mod;
        }
    }
    
    static boolean isPrime(int x) {
        for (int i = 2; i <= Math.sqrt(x); i++) {
            if (x % i == 0) {
                return false;
            }
        }
        return true;
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}