import java.util.*;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.math.BigInteger;
import java.util.Scanner;
import java.util.StringTokenizer;
 
public class temp {
	
	void solve() throws IOException {
		FastReader sc = new FastReader();
		int n = sc.nextInt();
		int m = sc.nextInt();
		
		long dp[] = new long[n + m + 1];
		dp[0] = 1;
		dp[1] = 1;
		
		for (int i = 2; i < n + m + 1; i++)
			dp[i] = (dp[i - 1] + dp[i - 2]) % (1000000007L);
		
		System.out.println(2 * (dp[n] + dp[m] - 1) % 1000000007);
	}
 
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		new temp().solve();
	}
	
	class FastReader {
		BufferedReader br;
		StringTokenizer st;
 
		public FastReader() {
			br = new BufferedReader(new InputStreamReader(System.in));
		}
 
		String next() {
			while (st == null || !st.hasMoreElements()) {
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			return st.nextToken();
		}
 
		int nextInt() {
			return Integer.parseInt(next());
		}
 
		long nextLong() {
			return Long.parseLong(next());
		}
 
		double nextDouble() {
			return Double.parseDouble(next());
		}
 
		String nextLine() {
			String str = "";
			try {
				str = br.readLine();
			} catch (IOException e) {
				e.printStackTrace();
			}
			return str;
		}
	}
}