#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  scanf("%d", &n);
  int v = n;
  int flag = 0;
  string str = "-";
  if (n == 0) {
    cout << "zero";
    return 0;
  }
  if (n > 10) {
    int k = n;
    n /= 10;
    if (n == 2)
      cout << "twenty";
    else if (n == 3)
      cout << "thirty";
    else if (n == 4)
      cout << "forty";
    else if (n == 5)
      cout << "fifty";
    else if (n == 6)
      cout << "sixty";
    else if (n == 7)
      cout << "seventy";
    else if (n == 8)
      cout << "eighty";
    else if (n == 9)
      cout << "ninety";
    else if (n == 1) {
      n = v % 10;
      flag = 1;
      if (n == 1) {
        cout << "eleven";
      }
      if (n == 2)
        cout << "twelve";
      else if (n == 3)
        cout << "thirteen";
      else if (n == 4)
        cout << "fourteen";
      else if (n == 5)
        cout << "fifteen";
      else if (n == 6)
        cout << "sixteen";
      else if (n == 7)
        cout << "seventeen";
      else if (n == 8)
        cout << "eighteen";
      else if (n == 9)
        cout << "nineteen";
    }
  } else if (n == 10)
    cout << "ten";
  if (!flag) {
    if (v > 10 && v % 10 != 0) cout << str;
    n = v % 10;
    if (n == 1) {
      cout << "one";
    }
    if (n == 2)
      cout << "two";
    else if (n == 3)
      cout << "three";
    else if (n == 4)
      cout << "four";
    else if (n == 5)
      cout << "five";
    else if (n == 6)
      cout << "six";
    else if (n == 7)
      cout << "seven";
    else if (n == 8)
      cout << "eight";
    else if (n == 9)
      cout << "nine";
  }
}
