#include<bits/stdc++.h>
using std::cin;
using std::cout;
using std::endl;
using std::vector;
using ll = long long;
const ll mod = 1e9+7;
#define rep(i,j,k) for(int i=int(j); i<int(k); i++)
#define REP(i,j,k) for(int i=int(j); i<=int(k); i++)

int main(){
    ll N; cin >> N;
    vector<ll> A(N), sum(N+1);
    std::map<ll,vector<ll>> mem;
    rep(i,0,N){
        cin >> A[i];
        sum[i+1] = A[i]^sum[i];
        mem[sum[i+1]].push_back(i+1);
    }
    //sum[1] ~ sum[N-1] までの部分列を数える
    vector<ll> dp(N);
    dp[0] = 1;
    //dp[i] = i番目までの総和
    rep(i,1,N){
        dp[i] = dp[i-1]*2%mod;
        ll index = std::lower_bound(mem[sum[i]].begin(), mem[sum[i]].end(), i)-mem[sum[i]].begin()-1;
        if(0 <= index){
            dp[i] -= dp[mem[sum[i]][index]-1];
            if(dp[i] < 0) dp[i] += mod;
        }
    }
    ll ans = 1;
    rep(i,1,N) ans = ans*2%mod;
    cout << ans << endl;
}