#include <bits/stdc++.h>

using namespace std;

int n;
int cnt[4];
int main() {
  scanf("%d", &n);
  for (int i = 0; i < n; i++) {
    int x, y;
    scanf("%d%d", &x, &y);
    x %= 2;
    y %= 2;
    cnt[x * 2 + y]++;
  }
  int sum = 0;
  for (int i = 0; i < 4; i++) {
    sum += cnt[i] / 2;
  }
  cout << (sum % 2 ? "Alice" : "Bob") << endl;
}