mod = 10 ** 9 + 7
n = int(input())
a = list(map(int, input().split()))
b = [0]
for i in range(n):
	b.append(b[-1] ^ a[i])
dp = [0] * n
dp[0] = 1
prev = dict()
for i in range(1, n):
	dp[i] = dp[i - 1] * 2
	if b[i] in prev:
		dp[i] -= dp[prev[b[i]] - 1]
	dp[i] %= mod
	prev[b[i]] = i
print(dp[-1])