#include <iostream>
#include <vector>
using namespace std;
int main(int argc, char* argv[])
{
	int N;
	cin>>N;
	vector<int> x(N),y(N);
	vector<int> flag(N,false);
	int i,j;
	for (i=0;i<N;i++){
		cin>>x[i]>>y[i];
	}
	bool bAliceOK=false;
	bool loop=true;
	while(loop){
		loop=false;
		for (i=0;i<N;i++){
			if (flag[i]){
				continue;
			}
			for (j=i+1;j<N;j++){
				if (flag[j]){
					continue;
				}
				if ((x[i]+x[j])%2==0 && (y[i]+y[j])%2==0){
					flag[i]=true;
					flag[j]=true;
					bAliceOK=bAliceOK==true?false:true;
					loop=true;
					break;
				}
			}
		}

	}
	if (bAliceOK){
		cout<<"Alice"<<endl;
	}else{
		cout<<"Bob"<<endl;
	}
	return 0;
}