#include <library.h>

string smalls[] =
  { "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", "ninty" };

// this version is guaranteed correct for any number < 1000000
// correct for X means it will say the number X corectly in words

void say_number(int N)
{ if (N < 20)
    print(smalls[N]);
  else if (N < 100)
  { const int part1 = N / 10;
    const int part2 = N % 10;
    print(tens[part1]);
    if (part2 != 0)
    { print(" ");
      say_number(part2); } }
  else if (N < 1000)
  { const int part1 = N / 100;
    const int part2 = N % 100;
    say_number(part1);
    print(" hundred");
    if (part2 != 0)
    { print(" and ");
      say_number(part2); } }
  else if (N < 1000000)
  { const int part1 = N / 1000;
    const int part2 = N % 1000;
    say_number(part1);
    print(" thousand");
    if (part2 != 0)
    { print(" ");
      say_number(part2); } }
  else
  { print("I don't know how to say ");
    print(N);
    print(" yet"); } }

int main()
{ const int number = read_int();
  say_number(number);
  new_line(); }