mod = int(1e9+7)

N = int(input())
A = list(map(int, input().split()))
B = [0]*(N+1)
for i in range(N):
    B[i+1] = A[i]^B[i]

dp = [0]*N
dp[0] = 1
mem = {}

for i in range(1,N):
    dp[i] = dp[i-1]*2
    if B[i] in mem.keys():
        dp[i] -= dp[mem[B[i]]-1]
    dp[i] %= mod
    if dp[i] < 0:
        dp[i] += mod
    mem[B[i]] = i
print(dp[N-1])