#include <iostream>
 #include <string>
 using namespace std;
 /**
    Turn a digit into its English name
    @param n an integer between 1 and 9
    @return the name of n ("one" . . . "nine")
 */
 string digit_name(int n)
 {  if (n == 1) return "one";
    if (n == 2) return "two";
    if (n == 3) return "three";
    if (n == 4) return "four";
    if (n == 5) return "five";
    if (n == 6) return "six";
    if (n == 7) return "seven";
    if (n == 8) return "eight";
    if (n == 9) return "nine";
    return "";
 }
 /**
    Turn a number between 10 and 19 into its English name
    @param n an integer between 10 and 19
    @return the name of n ("ten" . . . "nineteen")
 */
 string teen_name(int n)
 {  if (n == 10) return "ten";
    if (n == 11) return "eleven";
    if (n == 12) return "twelve";
    if (n == 13) return "thirteen";
    if (n == 14) return "fourteen";
    if (n == 15) return "fifteen";
    if (n == 16) return "sixteen";
    if (n == 17) return "seventeen";
    if (n == 18) return "eighteen";
    if (n == 19) return "nineteen";
    return "";
 }
 /**
    Give the English name of a multiple of 10
    @param n an integer between 2 and 9
    @return the name of 10 * n ("twenty" . . . "ninety")
 */
 string tens_name(int n)
 {  if (n == 2) return "twenty";
    if (n == 3) return "thirty";
    if (n == 4) return "forty";
    if (n == 5) return "fifty";
    if (n == 6) return "sixty";
    if (n == 7) return "seventy";
    if (n == 8) return "eighty";
    if (n == 9) return "ninety";
    return "";
 }
 /**
    Turn a number into its English name
    @param n a positive integer < 1,000,000
    @return the name of n (e.g. "two hundred seventy four")
 */
 string int_name(int n)
 {  int c = n; /* the part that still needs to be converted */
    string r; /* the return value */
 
    if (c >= 1000)
    {  r = int_name(c / 1000) + " thousand";
       c = c % 1000;
    }
    if (c >= 100)
    {  r = r + " " + digit_name(c / 100) + " hundred";
       c = c % 100;
    }
    if (c >= 20)
    {  r = r + " " + tens_name(c / 10);
       c = c % 10;
    }
    if (c >= 10)
    {  r = r + " " + teen_name(c);
       c = 0;
    }
    if (c > 0)
       r = r + " " + digit_name(c);
 
    return r;
 }
 
 int main()
 {  int n;
    cout << "Please enter a positive integer: ";
    cin >> n;
    cout << int_name(n);
    return 0;
 }