#include<iostream>
#include<algorithm>
#include<cmath>
#include<iomanip>
#include<vector>
#include<map>
#include<queue>
using namespace std;
typedef long long ll;
const int MOD=1e9+7;
int main() {
  int n,x,y,a[4]={},ans=0;
  cin >> n;
  for(int i=0; i<n; i++) {
    cin >> x >> y;
    if(x%2==0&&y%2==0) {
      a[0]++;
    }
    else if(x%2==0&&y%2==1) {
      a[1]++;
    }
    else if(x%2==1&&y%2==0) {
      a[2]++;
    }
    else if(x%2==1&&y%2==1) {
      a[3]++;
    }
  }
  for(int i=0; i<4; i++) {
    ans+=a[i]/2;
  }
  cout << (ans%2?"Alice":"Bob") << endl;
}