#!/usr/bin/env python3
#coding:utf-8

import math
import string
from sys import stdin
# import numpy as np
# from matplotlib import pyplot as plt

	
def main():
	read=stdin.readline

	#edit here!
	n=int(read())
	x=[0]*n
	y=[0]*n
	for i in range(n):
		x[i],y[i]=map(int,read().split())
	
	cnt=[0]*4
	for i in range(n):
		if x[i]%2==0 and y[i]%2==0:
			cnt[0]+=1
		elif x[i]%2==0 and y[i]%2==1:
			cnt[1]+=1
		elif x[i]%2==1 and y[i]%2==0:
			cnt[2]+=1
		else:
			cnt[3]+=1
	
	ans=0
	for i in range(4):
		ans+=cnt[i]//2
	
	if ans%2==1:
		print("Alice")
	else:
		print("Bob")
if __name__ == '__main__':
	main()