def main():
    N = int(input())
    cnt = [[0] * 2 for _ in range(2)]
    for _ in range(N):
        x, y = map(int, input().split())
        cnt[x%2][y%2] += 1

    ans = 0
    for i in range(2):
        for j in range(2):
            ans += cnt[i][j] // 2

    if ans % 2 == 0:
        print('Bob')
    else:
        print('Alice')
    



if __name__ == "__main__":
    main()