code: public double[] getCentralCuts(Integer size) throws SAXException {
      switch (size) {
      case 2:
        return center_case2;
      case 3:
        return center_case3;
      case 4:
        return center_case4;
      case 5:
        return center_case5;
      case 6:
        return center_case6;
      case 7:
        return center_case7;
      case 8:
        return center_case8;
      case 9:
        return center_case9;
      case 10:
        return center_case10;
      case 11:
        return center_case11;
      case 12:
        return center_case12;
      case 13:
        return center_case13;
      case 14:
        return center_case14;
      case 15:
        return center_case15;
      case 16:
        return center_case16;
      case 17:
        return center_case17;
      case 18:
        return center_case18;
      case 19:
        return center_case19;
      case 20:
        return center_case20;
      default:
        throw new SAXException("Invalid alphabet size.");
      }
    }
docs: Produces central cut intervals lines for the normal distribution.
  
  @param size the Alphabet size [2 - 20].
  @return an array of central lines for the specified alphabet size.
  @throws SAXException if error occurs.