#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  int n;
  cin >> n;

  map<pair<int, int>, int> hist;
  REP (i, n) {
    int x, y;
    cin >> x >> y;
    hist[{x%2, y%2}]++;
  }

  int ret = 0;
  for (auto &pr: hist)
    ret += pr.second / 2;

  if (ret % 2)
    cout << "Alice" << endl;
  else
    cout << "Bob" << endl;

  return 0;
}