public class DigitsRecursion
{
  public static void main(String args[]){
    printInteger(7309);
    
    System.out.println("");
  }
  
  static void printInteger(int x){
    if(x == 0)
      return;
    
    printInteger(x / 10);
    printDigit(x % 10);
  }
  
  static void printDigit(int x){
    switch(x){
        case 0:
          System.out.print("zero ");
          break;
        case 1:
          System.out.print("one ");
          break;
        case 2:
          System.out.print("two ");
          break;
        case 3:
          System.out.print("three ");
          break;
        case 4:
          System.out.print("four ");
          break;
        case 5:
          System.out.print("five ");
          break;
        case 6:
          System.out.print("six ");
          break;
        case 7:
          System.out.print("seven ");
          break;
        case 8:
          System.out.print("eight ");
          break;
        case 9:
          System.out.print("nine ");
          break;
        default:
          System.out.print("* ");
     }
   }
}