import java.util.Scanner;
public class ivanthefool {
	
	static int fib(int n) 
    { 
    if (n <= 1) 
       return n; 
    return fib(n-1) + fib(n-2); 
    } 


	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int m = sc.nextInt();
		
		System.out.println(2*fib(n)+2*fib(m)-2);
		
	}

}
