from collections import *
from itertools import *
from functools import *
from heapq import *
import sys,math

input = sys.stdin.readline

N = int(input())
XY = [tuple(map(int,input().split())) for _ in range(N)]

M = [(x%2,y%2) for x,y in XY]
C = Counter(M)
ans = 0
for v in C.values():
    ans += v//2
if ans%2==0:
    print('Bob')
else:
    print('Alice')