N = int(input())
be, le, re, bo = 0, 0, 0, 0
for i in range(N):
    x, y = map(int, input().split())
    if x % 2 == 0 and y % 2 == 0:
        be += 1
    elif x % 2 == 0:
        le += 1
    elif y % 2 == 0:
        re += 1
    else:
        bo += 1

num = be // 2 + le // 2 + re // 2 + bo // 2
if num % 2 == 0:
    print("Bob")
else:
    print("Alice")