#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000


int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	int N; cin >> N;
	int cnt[2][2];
	rep(i, 2) rep(j, 2) cnt[i][j] = 0;
	rep(i, N) {
		int a, b;
		cin >> a >> b;
		a %= 2;
		b %= 2;
		cnt[a][b]++;
	}
	int num = 0;
	rep(i, 2) rep(j, 2) {
		//cout << i << " " << j << " " << cnt[i][j] << endl;
		num += cnt[i][j] / 2;
	}
	if (num % 2 == 0) {
		cout << "Bob" << endl;
	}
	else {
		cout << "Alice" << endl;
	}

    return 0;
}