#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <sstream>
#include <cmath>

using namespace std;

int main() {

	int n =0;
	cin>>n;

	int odd_odd=0,odd_even=0, even__odd=0, even_even=0;

	long x=0,y=0;
	for(int i=0; i<n;i++){
		cin>>x>>y;

		if(x%2 !=0 && y%2 !=0){
			odd_odd++;
		}else if (x%2 !=0 && y%2 ==0) {
			odd_even++;
		}else if (x%2 ==0 && y%2 !=0) {
			even__odd++;
		}else if (x%2 ==0 && y%2 ==0) {
			even_even++;
		}

	}

	int turn_time = odd_odd/2+odd_even/2+even__odd/2+even_even/2;

	if(turn_time %2 ==0){
		cout<<"Bob"<<endl;
	}else {
		cout<<"Alice"<<endl;
	}

return 0;
}