#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  Int n;
  cin>>n;
  Int cnt[2][2]={};
  for(Int i=0;i<n;i++){
    Int x,y;
    cin>>x>>y;
    cnt[x&1][y&1]++;
  }
  Int ans=0;
  for(Int a=0;a<2;a++)
    for(Int b=0;b<2;b++)
      ans+=cnt[a][b]/2;
  cout<<(ans&1?"Alice":"Bob")<<endl;
  return 0;
}