#include <bits/stdc++.h>
using namespace std;
void seconddecimal(int s) {
  if (s < 2)
    cout << "one";
  else if (s < 3)
    cout << "two";
  else if (s < 4)
    cout << "three";
  else if (s < 5)
    cout << "four";
  else if (s < 6)
    cout << "five";
  else if (s < 7)
    cout << "six";
  else if (s < 8)
    cout << "seven";
  else if (s < 9)
    cout << "eight";
  else
    cout << "nine";
}
void seconddecimal2(int s) {
  if (s < 1)
    cout << "ten";
  else if (s < 2)
    cout << "eleven";
  else if (s < 3)
    cout << "twelve";
  else if (s < 4)
    cout << "thirteen";
  else if (s < 5)
    cout << "fourteen";
  else if (s < 6)
    cout << "fifteen";
  else if (s < 7)
    cout << "sixteen";
  else if (s < 8)
    cout << "seventeen";
  else if (s < 9)
    cout << "eighteen";
  else
    cout << "nineteen";
}
int main() {
  int s;
  cin >> s;
  if (s == 0)
    cout << "zero";
  else if (s / 10 < 1)
    seconddecimal(s % 10);
  else if (s / 10 < 2)
    seconddecimal2(s % 10);
  else if (s / 10 < 3) {
    cout << "twenty";
    if (s % 10 > 0) {
      cout << "-";
      seconddecimal(s % 10);
    }
  } else if (s / 10 < 4) {
    cout << "thirty";
    if (s % 10 > 0) {
      cout << "-";
      seconddecimal(s % 10);
    }
  } else if (s / 10 < 5) {
    cout << "forty";
    if (s % 10 > 0) {
      cout << "-";
      seconddecimal(s % 10);
    }
  } else if (s / 10 < 6) {
    cout << "fifty";
    if (s % 10 > 0) {
      cout << "-";
      seconddecimal(s % 10);
    }
  } else if (s / 10 < 7) {
    cout << "sixty";
    if (s % 10 > 0) {
      cout << "-";
      seconddecimal(s % 10);
    }
  } else if (s / 10 < 8) {
    cout << "seventy";
    if (s % 10 > 0) {
      cout << "-";
      seconddecimal(s % 10);
    }
  } else if (s / 10 < 9) {
    cout << "eighty";
    if (s % 10 > 0) {
      cout << "-";
      seconddecimal(s % 10);
    }
  } else {
    cout << "ninety";
    if (s % 10 > 0) {
      cout << "-";
      seconddecimal(s % 10);
    }
  }
}
