n = int(input())
cnt = [[0] * 2 for _ in range(2)]
for _ in range(n):
    x, y = map(int, input().split())
    cnt[x % 2][y % 2] += 1
    
ans = 0
for i in range(2):
    for j in range(2):
        ans += cnt[i][j] // 2
if ans % 2 == 0:
    print("Bob")
else:
    print("Alice")