#!/usr/bin/env python

n = int(input().strip())
points = []
for i in range(n):
    points.append([int(x) for x in input().split()])

eveneven = 0
evenodd = 0
oddeven = 0
oddodd = 0

for point in points:
    if point[0]%2==0 and point[1]%2==0:
        eveneven += 1
    elif point[0]%2==0 and point[1]%2==1:
        evenodd += 1
    elif point[0]%2==1 and point[1]%2==0:
        oddeven += 1
    else:
        oddodd += 1

ntimes = eveneven//2 + evenodd//2 + oddeven//2 + oddodd//2

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