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