n=int(input())
odd=0
even=0
mix_odd=0
mix_even=0
for i in range(n):
    x,y=map(int,input().split())
    if x%2==0 and y%2==0:
        even+=1
    elif x%2!=0 and y%2!=0:
        odd+=1
    elif x%2==0 and y%2!=0:
        mix_even+=1
    elif x%2!=0 and y%2==0:
        mix_odd+=1
    else:
        pass
if (even//2+odd//2+mix_odd//2+mix_even//2)%2==0:
    print("Bob")
else:
    print("Alice")