#include <bits/stdc++.h>
using namespace std;
vector<char*> names1;
vector<char*> names2;
int main() {
  int n, i, j, k;
  cin >> n;
  char s[10] = "aserf";
  names1.push_back(s);
  char sx[10] = "fury";
  names1.push_back(sx);
  for (i = 0; i <= 9; i++) {
    if (i == 0) {
      names2.push_back("zero");
    } else if (i == 1) {
      names2.push_back("one");
    } else if (i == 2) {
      names2.push_back("two");
      names1.push_back("twenty");
    } else if (i == 3) {
      names2.push_back("three");
      names1.push_back("thirty");
    } else if (i == 4) {
      names2.push_back("four");
      names1.push_back("forty");
    } else if (i == 5) {
      names2.push_back("five");
      names1.push_back("fifty");
    } else if (i == 6) {
      names2.push_back("six");
      names1.push_back("sixty");
    } else if (i == 7) {
      names2.push_back("seven");
      names1.push_back("seventy");
    } else if (i == 8) {
      names2.push_back("eight");
      names1.push_back("eighty");
    } else if (i == 9) {
      names2.push_back("nine");
      names1.push_back("ninety");
    }
  }
  j = n / 10;
  k = n % 10;
  if (n == 10) {
    cout << "ten";
  } else if (n == 11) {
    cout << "eleven";
  } else if (n == 12) {
    cout << "twelve";
  } else if (n == 13) {
    cout << "thirteen";
  } else if (n == 14) {
    cout << "fourteen";
  } else if (n == 15) {
    cout << "fifteen";
  } else if (n == 16) {
    cout << "sixteen";
  } else if (n == 17) {
    cout << "seventeen";
  } else if (n == 18) {
    cout << "eighteen";
  } else if (n == 19) {
    cout << "nineteen";
  } else {
    if (j > 0 && k == 0) {
      cout << names1[j];
    } else if (j == 0) {
      cout << names2[k];
    } else {
      cout << names1[j] << "-" << names2[k];
    }
  }
  return 0;
}
