#include <bits/stdc++.h>

using namespace std;

int main(void) {
  int n;
  cin >> n;

  int cnt[4] = {};
  for (int i = 0; i < n; i++) {
    int x, y;
    cin >> x >> y;
    cnt[(x & 1) + 2 * (y & 1)]++;
  }

  int ans = 0;
  for (int i = 0; i < 4; i++) {
    ans += cnt[i] / 2;
  }
  cout << (ans & 1 ? "Alice" : "Bob") << endl;

  return 0;
}