#int(input())
#map(int, input().split())
#list(map(int, input().split()))

N = int(input())
x = [0] * N
for i in range(N):
    x[i] = list(map(int, input().split()))

d = [0] * 4
for i in range(N):
    u = x[i][0]%2 + (x[i][1]%2) * 2
    d[u] += 1

t = 0
for i in range(4):
    t += d[i]//2

if t % 2 == 0:
    print("Bob")
else:
    print("Alice")