#include <bits/stdc++.h>
using namespace std;
#define ll long long 
#define IO ios::sync_with_stdio(false);cin.tie(0)

const int mod = 1e9 + 7;

int main() {
    IO; //freopen("in.txt", "r", stdin);
    int n; cin >> n;
    map<ll, ll> mp;
    mp[0] = 1;
    ll pre = 0, ans = 1;
    for(int i = 0; i < n; ++i) {
        ll x; cin >> x;
        ll val = mp[pre];
        mp[pre] = ans;
        ans <<= 1;
        ans -= val;
        ans = (ans % mod + mod) % mod;
        pre ^= x;
    }
    cout << ans << '\n';
    return 0;
}