#include <iostream>
using namespace std;

int C[4];

int main() {
	int N;cin>>N;
	for(int i=0;i<N;i++){
		int x,y;
		cin>>x>>y;
		if(x%2&&y%2)C[0]++;
		else if(x%2==0 && y%2==0)C[1]++;
		else if(x%2)C[2]++;
		else if(y%2)C[3]++;
	}
	
	int cnt=0;
	for(int i=0;i<4;i++)cnt+=C[i]/2;
	
	cout<<(cnt%2?"Alice":"Bob")<<endl;
	
	return 0;
}