#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int cnt[2][2] = {};
    int N; cin >> N;
    rep(i,N) {
        int x,y; cin >> x >> y;
        cnt[x % 2][y % 2]++;
    }

    int turn = 0;
    rep(x,2)rep(y,2) turn += cnt[x][y] / 2;
    cout << (turn % 2 == 1 ? "Alice" : "Bob") << endl;
}