import java.io.*;
import java.util.*;
import java.math.*;
import java.lang.*;
 
import static java.lang.Math.*;
 
public class Solution implements Runnable 
{
	static class InputReader 
	{
		private InputStream stream;private byte[] buf = new byte[1024];
		private int curChar;
		private int numChars;
		private SpaceCharFilter filter;
		private BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        public InputReader(InputStream stream){this.stream = stream;}
		public int read(){if (numChars==-1) throw new InputMismatchException();if (curChar >= numChars){curChar = 0;try{numChars = stream.read(buf);}catch (IOException e){throw new InputMismatchException();	}if(numChars <= 0)return -1;}return buf[curChar++];}
     	public String nextLine(){String str = "";try{str = br.readLine();}catch (IOException e){e.printStackTrace();}return str;}
		public int nextInt(){int c = read();	while(isSpaceChar(c))c = read();	int sgn = 1; if (c == '-'){sgn = -1;c = read();	}int res = 0;do{if(c<'0'||c>'9') throw new InputMismatchException();res *= 10;res += c - '0';c = read();}while (!isSpaceChar(c));return res * sgn;}
        public long nextLong(){int c = read();while (isSpaceChar(c))c = read();int sgn = 1;if (c == '-'){sgn = -1;c = read();}long res = 0;do{if (c < '0' || c > '9')throw new InputMismatchException();res *= 10;res += c - '0';c = read();}while (!isSpaceChar(c));return res * sgn;}
		public double nextDouble(){int c = read();while (isSpaceChar(c))c = read();int sgn = 1;if (c == '-'){sgn = -1;c = read();}double res = 0;while (!isSpaceChar(c) && c != '.'){if (c == 'e' || c == 'E')return res * Math.pow(10, nextInt());if (c < '0' || c > '9')
		throw new InputMismatchException();res *= 10;res += c - '0';c = read();}if (c == '.'){c = read();double m = 1;while (!isSpaceChar(c)){if (c == 'e' || c == 'E')return res * Math.pow(10, nextInt());if (c < '0' || c > '9')throw new InputMismatchException();m /= 10;res += (c - '0') * m;c = read();}}return res * sgn;}
        public String readString(){int c = read();while (isSpaceChar(c))c = read();StringBuilder res = new StringBuilder();do{res.appendCodePoint(c);c = read();}while (!isSpaceChar(c));return res.toString();}
		public boolean isSpaceChar(int c){if (filter != null)return filter.isSpaceChar(c);return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;}
		public String next(){return readString();}
        public interface SpaceCharFilter{public boolean isSpaceChar(int ch);}
	}
		
	public static void main(String args[]) throws Exception{new Thread(null, new Solution(),"Main",1<<27).start();}

	public static int gcd(int a, int b) { 	if (a == 0) return b; return gcd(b % a, a);} 
  
	public static int findGCD(int arr[], int n) { 	int result = arr[0]; for (int i = 1; i < n; i++) result = gcd(arr[i], result);return result; }	 
	
	static void sortbycolomn(long arr[][], int col)
    { 
        Arrays.sort(arr, new Comparator<long[]>() { 
        @Override              
        public int compare(final long[] entry1,final long[] entry2) { 
            if (entry1[col] > entry2[col])return 1; 
            else return -1; 
        } 
        });   
    }
    static long fii(int a,long[] fibo){
        if(fibo[a]!=0)
            return fibo[a];
        
        fibo[a]=(long)(fii(a-1,fibo)%1000000007 + fii(a-2,fibo)%1000000007);
        return fibo[a];
    }
	public void run()
    {
        InputReader in = new InputReader(System.in);
        PrintWriter w = new PrintWriter(System.out);
		
        int n=in.nextInt();
        int m=in.nextInt();
        int[] arr=new int[100005];
        arr[1]=2;
        arr[2]=4;
        for(int i=3;i<100005;i++) arr[i]=(arr[i-1]+arr[i-2])%1000000007;
        w.println((arr[n]+arr[m]-2)%1000000007);
                
        w.flush();
        w.close();
    }
}
