#include <bits/stdc++.h>
using namespace std;

//--------------------------------------------------

// odd-odd / odd-even / even-odd / even-even
int n, x, y, pr=0, cnt[4];

int main() {
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	
	cin >> n;
	for (int i = 0; i < n; ++i) {
		cin >> x >> y;
		if (x%2==0) {
			if (y%2==0) cnt[3]++;
			else cnt[2]++;
		}
		else {
			if (y%2==0) cnt[1]++;
			else cnt[0]++;
		}
	}
	
	for (int i = 0; i < 4; ++i) pr += cnt[i]/2;
	if (pr%2==0) cout << "Bob" << endl;
	else cout << "Alice" << endl;
}