from itertools import accumulate
from typing import Any, Sequence


MOD = int(1e9 + 7)


def countSubseq(s: Sequence[Any]) -> int:
    """O(n)求不同子序列个数(非空)"""
    n = len(s)
    dp = [0] * (n + 1)
    dp[0] = 1
    last = dict()
    for i, char in enumerate(s):
        dp[i + 1] = 2 * dp[i] % MOD
        if char in last:
            dp[i + 1] -= dp[last[char]]
        last[char] = i
    return (dp[n] - 1) % MOD


n = int(input())
nums = list(map(int, input().split()))

nums = list(accumulate(nums, lambda x, y: x ^ y))
nums.pop()
print((countSubseq(nums) + 1) % MOD)