#include<stdio.h>

void run(void){
  int n;
  scanf("%d",&n);
  int count[4]={};
  while(n>0){
    int x,y;
    scanf("%d%d",&x,&y);
    count[(x%2)*2+y%2]++;
    n--;
  }
  int cnt=0;
  for(n=0;n<4;n++) cnt+=count[n]/2;
  printf("%s\n",cnt%2==0?"Bob":"Alice");
  return;
}

int main(void){
  run();
  return 0;
}