#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vint;
typedef pair<int,int> pint;
typedef vector<pint> vpint;
#define rep(i,n) for(int i=0;i<(n);i++)
#define REP(i,n) for(int i=n-1;i>=(0);i--)
#define reps(i,f,n) for(int i=(f);i<(n);i++)
#define each(it,v) for(__typeof((v).begin()) it=(v).begin();it!=(v).end();it++)
#define all(v) (v).begin(),(v).end()
#define eall(v) unique(all(v), v.end())
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define chmax(a, b) a = (((a)<(b)) ? (b) : (a))
#define chmin(a, b) a = (((a)>(b)) ? (b) : (a))
const int MOD = 1e9 + 7;
const int INF = 1e9;
const ll INFF = 1e18;

int N;
ll x[100010], y[100010];

int main() {
	cin >> N;
	rep(i, N) cin >> x[i] >> y[i];
	vector<int> oo, oe, eo, ee;
	rep(i, N) {
		if((x[i] % 2) && (y[i] % 2)) oo.pb(i);
		else if((x[i] % 2) && (y[i] % 2 == 0)) oe.pb(i);
		else if((x[i] % 2) == 0 && (y[i] % 2)) eo.pb(i);
		else ee.pb(i);
	}
	// printf("%d %d %d %d\n", oo.size(), oe.size(), eo.size(), ee.size());
	int grudy = (oo.size() / 2) ^ (oe.size() / 2) ^ (eo.size() / 2) ^ (ee.size() / 2);
	if(grudy) printf("Alice\n");
	else printf("Bob\n");
	return 0;
}