#include<iostream>
#include<iomanip>
#include<math.h>
#include<vector>
#include<algorithm>
#include<set>
#include<map>
#include<queue>
#include<stack>
#include<string>
#include<string.h>
#define INF 1000000000ll
#define MOD 1000000007ll
#define EPS 1e-10
#define REP(i,m) for(long long i=0; i<m; i++)
#define FOR(i,n,m) for(long long i=n; i<m; i++)
#define DUMP(a) for(long long dump=0; dump<(ll)a.size(); dump++) { cout<<a[dump]; if(dump!=(ll)a.size()-1) cout<<" "; else cout<<endl; }
#define ALL(v) v.begin(),v.end()
#define pb push_back
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
typedef long double ld;

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);
	ll n;
	cin>>n;
	vector<P> p(n);
	REP(i,n) cin>>p[i].first>>p[i].second;
	ll oo=0,ee=0,oe=0,eo=0;
	REP(i,n) {
		if(abs(p[i].first)%2) {
			if(abs(p[i].second)%2) {
				oo++;
			} else {
				oe++;
			}
		} else {
			if(abs(p[i].second)%2) {
				eo++;
			} else {
				ee++;
			}
		}
	}
	ll c=oo/2+ee/2+oe/2+eo/2;
	if(c%2) cout<<"Alice"<<endl;
	else cout<<"Bob"<<endl;
}