import java.util.*;
public class MyClass {
  static int M=1000000007;
    public static void main(String args[]) {
      Scanner in=new Scanner(System.in);
      int n=in.nextInt();
      int m=in.nextInt();
      int a[]=new int[100005]; a[1]=2;a[2]=4;
      for(int i=3;i<100005;i++) a[i]=(a[i-1]+a[i-2])%M;
      int ans=(a[n]+a[m]-2)%M;
      
      System.out.println(ans);
    }
}
