#!/usr/bin/python2
# -*- coding: utf-8 -*-
# †
n = int(raw_input())
cnt = [[0 for j in xrange(2)] for i in xrange(2)] # cnt[2][2]
for _ in xrange(n):
    x, y = map(int, raw_input().split())
    cnt[x & 1][y & 1] += 1
pairs = 0
for i in xrange(2):
    for j in xrange(2):
        pairs += cnt[i][j] / 2
res = 'Alice' if pairs & 1 else 'Bob'
print res