#include<iostream>
using namespace std;
int c[4],n;
main()
{
	cin>>n;
	for(int i=0;i<n;i++)
	{
		int a,b;cin>>a>>b;
		c[a%2*2+b%2]++;
	}
	int cnt=0;
	for(int i=0;i<4;i++)cnt+=c[i]/2;
	cout<<(cnt%2?"Alice":"Bob")<<endl;
}