mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

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

    cs = [0] * (N+1)
    for i in range(N):
        cs[i+1] = cs[i] ^ A[i]
    val = {}
    left = [0] * (N+1)
    for i in range(1, N+1):
        v = cs[i]
        if v not in val:
            val[v] = [i]
        else:
            left[i] = val[v][-1]
            val[v].append(i)
    dp = [0] * (N+1)
    dp[0] = 1
    for i in range(1, N+1):
        l = left[i]
        if l and i != N:
            dp[i] = (dp[i-1] + (dp[i-1] - dp[l-1])%mod)%mod
            if cs[i] == 0:
                dp[i] = (dp[i] + 1)%mod
        else:
            dp[i] = (dp[i-1] * 2)%mod
    print((dp[-1] - dp[-2])%mod)


if __name__ == '__main__':
    main()