from collections import defaultdict
P = 10 ** 9 + 7
N = int(input())
A = [int(a) for a in input().split()]
B = []
s = 0
for a in A[:-1]:
    s ^= a
    B.append(s)
X = [1]
Y = [0, 1]
D = defaultdict(int)
for i, b in enumerate(B, 1):
    a = (Y[i] - Y[D[b]]) % P
    X.append(a)
    Y.append((Y[-1] + a) % P)
    D[b] = i
print(Y[-1])