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*/

#include <bits/stdc++.h>
using namespace std;

using VI = vector<int>;
using VVI = vector<VI>;
using PII = pair<int, int>;
using LL = long long;
using VL = vector<LL>;
using VVL = vector<VL>;
using PLL = pair<LL, LL>;
using VS = vector<string>;

#define ALL(a)  begin((a)),end((a))
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define MT make_tuple
#define SZ(a) int((a).size())
#define SORT(c) sort(ALL((c)))
#define RSORT(c) sort(RALL((c)))
#define UNIQ(c) (c).erase(unique(ALL((c))), end((c)))

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

#define FF first
#define SS second

template<class S, class T>
istream& operator>>(istream& is, pair<S,T>& p){
  return is >> p.FF >> p.SS;
}
template<class T>
istream& operator>>(istream& is, vector<T>& xs){
  for(auto& x: xs)
	is >> x;
  return is;
}
template<class S, class T>
ostream& operator<<(ostream& os, const pair<S,T>& p){
  return os << p.FF << " " << p.SS;
}
template<class T>
ostream& operator<<(ostream& os, const vector<T>& xs){
  for(unsigned int i=0;i<xs.size();++i)
	os << (i?" ":"") << xs[i];
  return os;
}
template<class T>
void maxi(T& x, T y){
  if(x < y) x = y;
}
template<class T>
void mini(T& x, T y){
  if(x > y) x = y;
}
void debug(istringstream&){}
template <char sep=',', class Head, class... Tail>
void debug(istringstream& iss, Head&& head, Tail&&... tail)
{
  string name;
  getline(iss, name, ',');
  cout << sep << name << "=" << head;
  debug(iss, forward<Tail>(tail)...);
}

#ifdef PYONPOI
#define DEBUG(...) \
  do{ \
    istringstream ss(#__VA_ARGS__); \
    debug<' '>(ss, __VA_ARGS__); \
    cout<<endl; \
  }while(0)
#else
#define DEBUG
#endif


const double EPS = 1e-10;
const double PI  = acos(-1.0);
const LL MOD = 1e9+7;

LL powm(LL a, LL b){
  if(!b) return 1;
  return powm(a*a%MOD, b/2) * (b%2 ? a : 1ll) % MOD;
}

LL lazy_add[(1<<20)+10];

int main(){
  cin.tie(0);
  ios_base::sync_with_stdio(false);

  int N;
  cin >> N;
  VI xs(N);
  cin >> xs;

  VI acc(N+1);
  REP(i,N) acc[i+1] = acc[i] ^ xs[i];

  unordered_map<LL,PLL> dp;
  LL time = 0;
  FOR(i,1,N+1){
    LL a = acc[i];

    if(a){
      if(!dp.count(a)){
        dp[a] = MP(0, 0);
        lazy_add[a] = time;
      }
      if(lazy_add[a] < time){
        LL dtime = time - lazy_add[a];
        (dp[a].FF += dp[a].SS * dtime % MOD) %= MOD;
        lazy_add[a] = time;
      }

      (dp[a].SS += dp[a].FF + 1) %= MOD;
    }
    else{
      time++;
    }
  }

  for(auto& p: dp){
    LL a = p.FF;
    if(lazy_add[a] < time){
      LL dtime = time - lazy_add[a];
      (dp[a].FF += dp[a].SS * dtime % MOD) %= MOD;
      lazy_add[a] = time;
    }
  }

  LL ans = 0;
  if(acc.back()){
    (ans += dp[acc.back()].FF + 1) %= MOD;
  }
  else{
    for(auto& p: dp){
      (ans += p.SS.SS) %= MOD;
    }

    LL z = 0;
    FOR(i,1,N) if(!acc[i]) ++z;
    (ans += powm(2, z)) %= MOD;
  }
  cout << ans << endl;

  return 0;
}

Measured memory_bytes: 30408