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

int main(){
  int n;
  cin >> n;
  vector<P> p1, p2, p3, p4;
  rep(i,n) {
    int x, y;
    cin >> x >> y;
    if (x % 2 == 0) {
      if (y % 2 == 0) p1.push_back({x,y});
      else p2.push_back({x,y});
    } else {
      if (y % 2 == 0) p3.push_back({x,y});
      else p4.push_back({x,y});
    }
  }
  int res = sz(p1) / 2 + sz(p2) / 2 + sz(p3) / 2 + sz(p4) / 2;
  cout << (res & 1 ? "Alice" : "Bob") << endl;
  return 0;
}