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

#define DEBUG(x) cout<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cout<<#v<<":";for(int i=0;i<v.size();i++) cout<<" "<<v[i]; cout<<endl

typedef long long ll;
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
const int inf = 1000000001;
const ll INF = 1e18 * 2;
#define MOD 1000000007
#define mod 1000000009
#define pi 3.14159265358979323846
#define Sp(p) cout<<setprecision(15)<< fixed<<p<<endl;
int dx[4] = { 1,0,-1,0 }, dy[4] = { 0,1,0,-1 };
int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };

int main() {
	int n, i, j;
	cin >> n;
	vi cnt(4);
	for (i = 0; i < n; i++) {
		int x, y;
		cin >> x >> y;
		if (x % 2 && y % 2) {
			cnt[0]++;
		}
		else if (x % 2 && !(y % 2)) {
			cnt[1]++;
		}
		else if (!(x % 2) && y % 2) {
			cnt[2]++;
		}
		else {
			cnt[3]++;
		}
	}
	int cnt2 = 0;
	for (i = 0; i < 4; i++) {
		cnt2 += cnt[i] / 2;
	}
	if (cnt2 % 2) {
		cout << "Alice" << endl;
	}
	else {
		cout << "Bob" << endl;
	}
}