#include <bits/stdc++.h>
using namespace std;
string arr[100];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int N;
  cin >> N;
  arr[0] = "zero", arr[1] = "one", arr[2] = "two", arr[3] = "three",
  arr[4] = "four";
  arr[5] = "five", arr[6] = "six", arr[7] = "seven", arr[8] = "eight",
  arr[9] = "nine";
  arr[20] = "twenty", arr[30] = "thirty", arr[40] = "forty", arr[50] = "fifty",
  arr[60] = "sixty";
  arr[70] = "seventy", arr[80] = "eighty", arr[90] = "ninety";
  if (N == 0)
    cout << "zero";
  else if (N == 1)
    cout << arr[N];
  else if (N == 2)
    cout << arr[N];
  else if (N == 3)
    cout << arr[N];
  else if (N == 4)
    cout << arr[N];
  else if (N == 5)
    cout << arr[N];
  else if (N == 6)
    cout << arr[N];
  else if (N == 7)
    cout << arr[N];
  else if (N == 8)
    cout << arr[N];
  else if (N == 9)
    cout << arr[N];
  else if (N == 10)
    cout << "ten";
  else if (N == 11)
    cout << "eleven";
  else if (N == 12)
    cout << "twelve";
  else if (N / 10 == 1) {
    if (N == 13)
      cout << "thirteen";
    else if (N == 15)
      cout << "fifteen";
    else if (N == 18)
      cout << "eighteen";
    else
      cout << arr[N % 10] + "teen";
  } else {
    if (N % 10 == 0)
      cout << arr[N];
    else
      cout << arr[N / 10 * 10] << '-' << arr[N % 10];
  }
}
