import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N = int(input())
	odd_even = 0
	odd_odd = 0
	even_odd = 0
	even_even = 0
	for i in range(N):
		x, y = getlist()
		if x % 2 == 0 and y % 2 == 0:
			even_even += 1
		elif x % 2 == 0 and y % 2 == 1:
			even_odd += 1
		elif x % 2 == 1 and y % 2 == 0:
			odd_even += 1
		else:
			odd_odd += 1

	jud = int(odd_even // 2) + int(odd_odd // 2) + int(even_odd) // 2 + int(even_even // 2)
	if jud % 2 == 0:
		print("Bob")
	else:
		print("Alice")


if __name__ == '__main__':
	main()