/* -*- coding: utf-8 -*-
 *
 * 601.cc: No.601 Midpoint Erase - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

int cs[4];

/* subroutines */

/* main */

int main() {
  int n;
  scanf("%d", &n);

  for (int i = 0; i < n; i++) {
    int x, y;
    scanf("%d%d", &x, &y);

    cs[(y & 1) * 2 + (x & 1)]++;
  }
  //for (int i = 0; i < 4; i++) printf("cs[%d]=%d\n", i, cs[i]);

  int sum = 0;
  for (int i = 0; i < 4; i++) sum += cs[i] / 2;

  if (sum & 1) puts("Alice");
  else puts("Bob");

  return 0;
}