#include<iostream>
#include<cstdio>
#include<unordered_map>
using namespace std;
const int N=200005;
const int MOD=1000000007;
int n;
int a[N];
int sum[N];
int f[N];
int main()
{
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
        scanf("%d",&a[i]);
    for(int i=1;i<=n;i++)
        sum[i]=sum[i-1]^a[i];
    unordered_map<int,int>pre;
    f[1]=1;
    for(int i=2;i<=n;i++)
    {
        f[i]=f[i-1]*2%MOD;
        if(pre[sum[i]]-1>=0)
        f[i]=(f[i]-f[pre[sum[i]]-1])%MOD;
        f[i]+=MOD;
        f[i]%=MOD;
        pre[sum[i]]=i;
	}
    printf("%d",f[n]);
    return 0;
}