#include<iostream>
#include<unordered_map>
#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;
int n,a[1000500],c[1000500],f[1000500],ans=0;
unordered_map<int,int>last;
const int mod=1e9+7;
int main() {
    ios::sync_with_stdio(0);
    int n,m;
    cin>>n;
    for(int i=1;i<=n;i++){
    	cin>>c[i];
    	a[i]=a[i-1]^c[i];
	}
	ans=0;
    memset(f,0,sizeof(f));
    f[0]=1;
    for(int i=1;i<=n;i++) {
        if(!last[a[i]])f[i]=(2ll*f[i-1])%mod;
        else f[i]=(2ll*f[i-1]-f[last[a[i]]-1]+mod)%mod;
        last[a[i]]=i;
    }
    ans=(f[n]%mod+mod)%mod;
    cout<<ans<<endl;
    return 0;
}