from collections import defaultdict

N = int(input())
A = [0]+list(map(int, input().split()))

d = defaultdict(int)
xor = 0
B = [0]*(N+1)
for i in range(N+1):
    xor ^= A[i]
    B[i] = d[xor]
    d[xor] = i

dp = [0]*(N+1)
mod = 10**9+7
dp[1] = 1
for i in range(1,N):
    dp[i+1] = (2*dp[i]-dp[B[i]])%mod
print(dp[-1])