#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> PII;

const int MM = 1e9 + 7;
const double eps = 1e-8;
const int MAXN = 2e6 + 10;

int n, m;

void prework(){

}

void read(){

}

int a[3][3];

int gao(int cnt){
	//cerr << cnt << endl;
	return cnt / 2;
}

void solve(int casi){
//	cout << "Case #" << casi << ": ";
	cin >> n;
	//cout << "??? " << n << endl;
	for (int i = 1; i <= n; i++){
		int x, y;
		cin >> x >> y;
		//cout << x << ' ' << y << endl;
		a[x & 1][y & 1]++;
	}
	int ans = 0;
	for (int i = 0; i <= 1; i++)
		for (int j = 0; j <= 1; j++)
			ans += gao(a[i][j]);
	cout << ((ans & 1) ? "Alice" : "Bob") << endl;
}

void printans(){

}


int main(){
	std::ios::sync_with_stdio(false);
	prework();
	int T = 1;
//	cin>>T;
	for(int i = 1; i <= T; i++){
		read();
		solve(i);
		printans();
	}
	return 0;
}