import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
public class AAAB {

    static int mod=1000000007;

    void run()throws Exception{
        FastReader scan = new FastReader();
        int n=scan.nextInt();
        int m=scan.nextInt();


        long[] fibo = new long[1000050];
        fibo[0]=1;
        fibo[1]=1;
        for (int i=2;i<1000050;i++) fibo[i]=(fibo[i-1]+fibo[i-2])%mod;

        System.out.println((mod+fibo[n]+fibo[m]-1)*2 %mod);

    }

    public static void main(String[] args) throws Exception {
        new AAAB().run();
    }
    static 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;
        }
    }
}
