#define _CRT_SECURE_NO_WARNINGS

#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <fstream>
#include <set>
#include <utility>
#include <algorithm>
#include <queue>
#include <stack>
#include <deque>
#include <numeric>
#include <sstream>
#include <list>
#include <map>
#include <functional>
#include <iterator>

#define rep(i,p,n) for(int i=(int)p;i<(int)n;i++)
#define repp(i,p,n) for(int i=(int)p;i>=(int)n;i--)
#define Sort(x) sort(x.begin(),x.end())
#define PSort(x) sort(begin(x), end(x), pairCompare)
#define ll long long
#define INF 2000000000
#define pb push_back
#define mp make_pair
#define PI 3.14159265358979

using namespace std;

int main() {
	int n;
	int v[2][2] = {};
	cin >> n;
	rep(i, 0, n) {
		int x, y;
		cin >> x >> y;
		v[x % 2][y % 2] ++;
	}

	int ans = 0;
	rep(i, 0, 2) {
		rep(j, 0, 2) {
			ans += v[i][j] / 2;
		}
	}

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