int numMeds = (right - left)/5;
	   for(int i = 0; i < numMeds; i++)
	   {
		   insertion_sort(left + 5*i, left + 5*(i+1) - 1);
	       swap_numbers(left + 5*i + 3, i);
	   }
	   insertion_sort(0, numMeds);
	   swap_numbers(numMeds/2, right);
	   return(_group[right]);