import sys,collections
sys.setrecursionlimit(10**7)
def Is(): return [int(x) for x in sys.stdin.readline().split()]
def Ss(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def S(): return input()

n = I()
g = [0]*4
for i in range(n):
    x,y = Is()
    if x%2==0:
        if y%2==0:
            g[0] += 1
        else:
            g[1] += 1
    else:
        if y%2==0:
            g[2] += 1
        else:
            g[3] += 1
sum = 0
for e in g:
    sum += e//2
if sum%2 == 0:
    print("Bob")
else:
    print("Alice")