#include <bits/stdc++.h>

using namespace std;

#define INF 100000000
#define YJ 1145141919
#define INF_INT_MAX 2147483647
#define INF_LL_MAX 9223372036854775807
#define EPS 1e-10
#define Pi acos(-1)
#define LL long long
#define ULL unsigned long long
#define LD long double

using namespace std;

int main()
{
  int N;
  int Data[4];
  memset(Data, 0, sizeof(Data));

  cin >> N;
  for(int i = 0; i < N; i++) {
    int x, y;
    cin >> x >> y;
    Data[x%2 + 2*(y%2)]++;
  }

  int ans = 0;
  for(int i = 0; i < 4; i++) {
    ans += Data[i]/2;
  }

  if(ans%2 == 0) {
    cout << "Bob" << endl;
  } else {
    cout << "Alice" << endl;
  }

  return 0;
}