n=int(input())
oddodd=0
oddeven=0
evenodd=0
eveneven=0
for _ in range(n):
    a,b=map(int,input().split())
    if a%2==0 and b%2==0:
        eveneven+=1
    elif a%2==0 and b%2==1:
        evenodd+=1
    elif a%2==1 and b%2==0:
        oddeven+=1
    else:
        oddodd+=1
goukei=eveneven//2+oddodd//2+evenodd//2+oddeven//2
if goukei%2==1:
    print('Alice')
else:
    print('Bob')