n=int(input()) even=0#偶数 odd=0#奇数 mix=0 mis=0 for i in range(n): x,y=map(int,input().split()) if x%2==0 and y%2==0: even+=1 if x%2!=0 and y%2!=0: odd+=1 if x%2!=0 and y%2==0: mix+=1 if x%2==0 and y%2!=0: mis+=1 if (even/2+odd//2+mis//2+mix//2)%2==0: print("Bob") else: print("Alice")