import sys
from collections import defaultdict

MOD = 10**9 + 7

def main():
    N, *rest = map(int, sys.stdin.read().split())
    A = rest[:N]
    
    # Compute prefix_xor array
    prefix_xor = [0] * (N + 1)
    for i in range(1, N + 1):
        prefix_xor[i] = prefix_xor[i - 1] ^ A[i - 1]
    
    # Extract Q = prefix_xor[1..N]
    Q = prefix_xor[1:]
    target = Q[-1] if Q else 0
    
    last = defaultdict(int)
    current_total = 0
    res = 0
    
    for i in range(len(Q)):
        current_value = Q[i]
        new_sub = (current_total + 1 - last[current_value]) % MOD
        if current_value == target:
            res = (res + new_sub) % MOD
        last[current_value] = (last[current_value] + new_sub) % MOD
        current_total = (current_total + new_sub) % MOD
    
    print(res % MOD)

if __name__ == "__main__":
    main()