mod = 998244353


def main():
    import sys
    input = sys.stdin.readline
    
    N = int(input())
    A = list(map(int, input().split()))
    
    g = 0
    for i in range(N):
        if i & 1:
            g ^= A[i]
    if g:
        print("Alice")
    else:
        print("Bob")


if __name__ == '__main__':
    main()