n = int(input())
al = [tuple(int(i) for i in input().split()) for _ in range(n)]

cnt = [0]*4
for a in al:
    if a[0] % 2 == 0 and a[1] % 2 == 0:
         cnt[0] += 1
    if a[0] % 2 == 1 and a[1] % 2 == 0:
         cnt[1] += 1
    if a[0] % 2 == 0 and a[1] % 2 == 1:
         cnt[2] += 1
    if a[0] % 2 == 1 and a[1] % 2 == 1:
         cnt[3] += 1

ans = sum(map(lambda x: x//2, cnt))
print("Alice" if ans % 2 == 1 else "Bob")