N = int(input())

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