#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int arr[n];
  for (int i = 0; i < n; i++) {
    int t;
    cin >> t;
    arr[i] = t;
  }
  long sum = 0;
  for (int i = 1; i < n; i++) {
    long t1 = arr[i] ^ arr[i - 1];
    sum = sum + t1;
  }
  cout << sum % 1000000007;
}
