public class Exercise20_12 {
  public static void main(String[] args) {
    reverseDisplay("abcdefg");
  }

  public static void reverseDisplay(String value) {
    reverseDisplay(value, value.length() - 1);
  }

  public static void reverseDisplay(String value, int high) {
    if (high >= 0) {
      System.out.print(value.charAt(high));
      reverseDisplay(value, high - 1);
    }
  }
}