package Array;

import java.util.Random;

public class IceCream {
   private static Random rand=new Random();
   public static final String[] ff={
	   "aa","bb","ss","dd","ff","gg","hh","jj","kk","ll","ll","ll"
   };
   public static String[] ffSet(int n){
	   String[] results=new String[n];
	   boolean[] pp=new boolean[ff.length];
	   for(int i=0;i<n;i++){
		   int t;
		   do
			   t=rand.nextInt(ff.length);
		   while(pp[t]);
		   results[i]=ff[t];
		   pp[t]=true;
		   
	   }
	   return results;
   }
   public static void main(String[] args){
	   for(int i=0;i<20;i++){
		   System.out.println("ff("+i+")=");
		   String[] f1=ffSet(ff.length);
		   for(int j=0;j<f1.length;j++){
			   System.out.println("\t"+f1[j]);
		   }
	   }
   }
}