import sys
input = sys.stdin.readline

N = int(input())
ee, eo, oe, oo = 0, 0, 0, 0

for _ in range(N):
    xi, yi = map(int, input().split())
    
    if xi%2==0 and yi%2==0:
        ee += 1
    elif xi%2==0 and yi%2==1:
        eo += 1
    elif xi%2==1 and yi%2==0:
        oe += 1
    elif xi%2==1 and yi%2==1:
        oo += 1

p = ee//2+eo//2+oe//2+oo//2

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