N = int(input())
count_ee = 0
count_eo = 0
count_oe = 0
count_oo = 0

def ck_evenodd(n):
    n = int(n)
    if n % 2 == 0:
        return 0
    else:
        return 1

for i in range(N):
    x, y = map(ck_evenodd, input().split())
    if x == 0 and y == 0:
        count_ee += 1
    elif x == 0 and y == 1:
        count_eo += 1
    elif x == 1 and y == 0:
        count_oe += 1
    else:
        count_oo += 1

times = (count_ee // 2) + (count_eo // 2) + (count_oe // 2) + (count_oo // 2)
if times == 0:
    print("Bob")
elif times % 2 == 0:
    print("Bob")
else:
    print("Alice")