#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  string s[1000];
  cin >> n;
  if (!n) {
    printf("zero");
    return 0;
  }
  if (!(n % 10)) {
    switch (n) {
      case 10:
        cout << "ten";
        break;
      case 20:
        cout << "twenty";
        break;
      case 30:
        cout << "thirty";
        break;
      case 40:
        cout << "forty";
        break;
      case 50:
        cout << "fifty";
        break;
      case 60:
        cout << "sixty";
        break;
      case 70:
        cout << "seventy";
        break;
      case 80:
        cout << "eighty";
        break;
      case 90:
        cout << "ninety";
        break;
    }
    return 0;
  }
  vector<int> v;
  while (n) {
    v.push_back(n % 10);
    n /= 10;
  }
  if (v.size() == 2) {
    if (v[1] != 1) {
      switch (v[1]) {
        case 2:
          cout << "twenty";
          break;
        case 3:
          cout << "thirty";
          break;
        case 4:
          cout << "forty";
          break;
        case 5:
          cout << "fifty";
          break;
        case 6:
          cout << "sixty";
          break;
        case 7:
          cout << "seventy";
          break;
        case 8:
          cout << "eighty";
          break;
        case 9:
          cout << "ninety";
          break;
      }
      cout << "-";
      switch (v[0]) {
        case 1:
          cout << "one";
          break;
        case 2:
          cout << "two";
          break;
        case 3:
          cout << "three";
          break;
        case 4:
          cout << "four";
          break;
        case 5:
          cout << "five";
          break;
        case 6:
          cout << "six";
          break;
        case 7:
          cout << "seven";
          break;
        case 8:
          cout << "eight";
          break;
        case 9:
          cout << "nine";
          break;
      }
    } else {
      switch (v[0]) {
        case 1:
          cout << "eleven";
          break;
        case 2:
          cout << "twelve";
          break;
        case 3:
          cout << "thirteen";
          break;
        case 4:
          cout << "fourteen";
          break;
        case 5:
          cout << "fifteen";
          break;
        case 6:
          cout << "sixteen";
          break;
        case 7:
          cout << "seventeen";
          break;
        case 8:
          cout << "eighteen";
          break;
        case 9:
          cout << "nineteen";
          break;
      }
    }
  } else {
    switch (v[0]) {
      case 1:
        cout << "one";
        break;
      case 2:
        cout << "two";
        break;
      case 3:
        cout << "three";
        break;
      case 4:
        cout << "four";
        break;
      case 5:
        cout << "five";
        break;
      case 6:
        cout << "six";
        break;
      case 7:
        cout << "seven";
        break;
      case 8:
        cout << "eight";
        break;
      case 9:
        cout << "nine";
        break;
    }
  }
  return 0;
}
