import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)

oo = 0
ee = 0
oe = 0
eo = 0
N = int(input())
for _ in range(N):
    x, y = map(int, input().split())
    x %= 2
    y %= 2
    if (x, y) == (0, 0):
        ee += 1
    elif (x, y) == (1, 1):
        oo += 1
    elif (x, y) == (0, 1):
        eo += 1
    else:
        oe += 1

ee //= 2
oo //= 2
oe //= 2
eo //= 2
s = ee + oo + eo + oe
if s % 2 == 1:
    print("Alice")
else:
    print("Bob")