using System;
using System.Linq;
using System.Collections.Generic;

public static class Program{
    static int mod = 1000000007;
    public static void Main() {
        int[]np=Console.ReadLine().Split().Select(int.Parse).ToArray();
        int n=np[0];
        int p=np[1];
        int[]a=new int[n+1];
        a[0]=0;
        a[1]=1;
        for(int i=2;i<n;i++){
            a[i]=Add(Mul(a[i-1],p),a[i-2]);
        }
        int sum=0;
        int sqsum=0;
        for(int i=0;i<n;i++){
            AddAssign(ref sum,a[i]);
            AddAssign(ref sqsum,Mul(a[i],a[i]));
        }
        int ans=Mul(Add(Mul(sum,sum),sqsum),Inv(2));
        Console.WriteLine(ans);
    }
    static void AddAssign(ref int x, int y){
        x+=y;
        if(mod<=x)x-=mod;
    }
    static int Add(int x, int y){
        AddAssign(ref x, y);
        return x;
    }
    static int Mul(int x, int y){
        return (int)((long)x*y%mod);
    }
    static void MulAssign(ref int x, int y){
        x=Mul(x,y);
    }
    static int Pow(int x, long y){
        int ans=1;
        for(;y>0;y/=2){
            if(y%2==1)MulAssign(ref ans,x);
            MulAssign(ref x,x);
        }
        return ans;
    }
    static int Inv(int x){
        return Pow(x,mod-2);
    }
}