#include <bits/stdc++.h>

using namespace std;

int main()
{
  int N, type[2][2] = {{}};

  cin >> N;
  for(int i = 0; i < N; i++) {
    int X, Y;
    cin >> X >> Y;
    ++type[X % 2][Y % 2];
  }

  int tern = 0;
  for(int i = 0; i < 2; i++) {
    for(int j = 0; j < 2; j++) {
      tern += type[i][j] / 2;
    }
  }

  if(tern % 2 == 0) cout << "Bob" << endl;
  else cout << "Alice" << endl;

  return (0);
}