#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int n;
  cin >> n;
  vector<int> cnt(4, 0);
  rep(i, n) {
    int x, y;
    cin >> x >> y;
    cnt[x % 2 * 2 + y % 2]++;
  }
  int ans = cnt[0] / 2 + cnt[1] / 2 + cnt[2] / 2 + cnt[3] / 2;
  cout << (ans % 2 == 1 ? "Alice" : "Bob") << '\n';
  return 0;
}