#include "library.h"

string Small[] = { "zero", "one", "two", "three", "four", "five",
                   "six", "seven", "eight", "nine", "ten", "eleven",
                   "twelve", "thirteen", "fourteen", "fifteen", "sixteen",
                   "seventeen", "eighteen", "nineteen" };

string tens[] = { "", "", "twenty", "thirty", "forty", "fifty", "sixty",
                  "seventy", "eighty", "ninety" };

void say(const int N)
{ if (N < 20)
    cout << Small[N];
  else if (N < 100)
  { cout << tens[N / 10] << " ";
    if (N % 10 != 0)
      say(N % 10); }
  // up to this point, it is guaranteed to work for every number < 100
  else if (N < 1000)
  { const int first = N / 100;
    const int second = N % 100;
    say(first);
    cout << " hundred";
    if (second != 0)
    { cout << " ";
      say(second); } }
  // up to this point, it is guaranteed to work for every number < 1000
  else if (N < 1000000)
  { const int first = N / 1000;
    const int second = N % 1000;
    say(first);
    cout << " thousand";
    if (second != 0)
    { cout << " ";
      say(second); } }
  // up to this point, it is guaranteed to work for every number < 1000000
}

void main()
{ const int x = read_int();
  say(x);
  cout << "\n";
  main(); }