case 1:
  printf("one");
  break;

case 2:
  printf("two");
  break;

case 3:
  printf("three");
  break;

case 4:
  printf("four");
  break;

case 5:
  printf("five");
  break;

case 6:
  printf("six");
  break;

case 7:
  printf("seven");
  break;

case 8:
  printf("eight");
  break;

case 9:
  printf("nine");
  break;

case 10:
  printf("ten");
  break;

case 11:
  printf("eleven");
  break;

case 12:
  printf("twelve");
  break;

case 13:
  printf("thirteen");
  break;

case 14:
  printf("fourteen");
  break;

case 15:
  printf("fifteen");
  break;

case 16:
  printf("sixteen");
  break;

case 17:
  printf("seventeen");
  break;

case 18:
  printf("eightteen");
  break;

case 19:
  printf("nineteen");
  break;