n = int(input())
EE_n, EO_n, OE_n, OO_n = 0, 0, 0, 0
for _ in range(n):
    x, y = map(int, input().split())
    if x % 2 == 0 and y % 2 == 0:
        EE_n += 1
    elif x % 2 == 0 and y % 2 == 1:
        EO_n += 1
    elif x % 2 == 1 and y % 2 == 0:
        OE_n += 1
    else:
        OO_n += 1
cnt = EE_n // 2 + EO_n // 2 + OE_n // 2 + OO_n // 2
if cnt % 2 == 0:
    print("Bob")
else:
    print("Alice")