#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>
#include <ctype.h>
#include <fstream>
#include <cassert>
//#include <bits/stdc++.h>
using namespace std;

//#include<bits/stdc++.h>


	
int main() {
	int a = 0, b = 0, c = 0, d = 0;
	int n;
	cin >> n;
	for (int i = 0; i < n; i++) {
		int x, y;
		cin >> x >> y;
		if (x % 2) {
			if (y % 2)a++;
			else b++;
		}
		else {
			if (y % 2)c++;
			else d++;
		}
	}
	int t = a / 2 + b / 2 + c / 2 + d / 2;
	if (t % 2==0)cout << "Bob" << endl;
	else cout << "Alice" << endl;
	
	return 0;
}