MOD = 10**9 + 7

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

prefix = [0] * (n + 1)
for i in range(n):
    prefix[i+1] = prefix[i] ^ A[i]

target = prefix[n]

from collections import defaultdict

last = defaultdict(int)
last[0] = 1  # Initial state: the subsequence [0]
total = 1     # Sum of all values in 'last', initially 1

for i in range(1, n + 1):
    s = prefix[i]
    new_count = (total - last[s]) % MOD
    total = (total + new_count) % MOD
    last[s] = (last[s] + new_count) % MOD

print(last.get(target, 0) % MOD)