"""

https://yukicoder.me/problems/no/1493

累積XOR列の部分列の個数に等しいのでは？
ただし、最初と最後は絶対取る

"""

# https://noshi91.hatenablog.com/entry/2023/02/26/135340
def number_of_subsequence(A, mod):

    N = len(A)

    dp = {}

    s = 1

    for c in A:
        news = 2*s
        if c in dp:
            news -= dp[c]
        dp[c] = s
        s = news % mod

    return s

N = int(input())
A = list(map(int,input().split()))

B = [0]
for a in A:
    B.append( B[-1] ^ a )

print (number_of_subsequence(B[1:-1], 10**9+7))