#include <bits/stdc++.h>
using namespace std;
int main() {
  string A[10], B[10];
  A[0] = "zero";
  A[1] = "one";
  A[2] = "two";
  A[3] = "three";
  A[4] = "four";
  A[5] = "five";
  A[6] = "six";
  A[7] = "seven";
  A[8] = "eight";
  A[9] = "nine";
  A[10] = "ten";
  B[2] = "twenty";
  B[3] = "thirty";
  B[4] = "forty";
  B[5] = "fifty";
  B[6] = "sixty";
  B[7] = "seventy";
  B[8] = "eighty";
  B[9] = "ninety";
  int n, p;
  cin >> n;
  if (n < 11) {
    cout << A[n];
  } else if (n > 10 && n < 20) {
    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 (n == 20)
      cout << "twenty";
  } else {
    p = n / 10;
    cout << B[p];
    n = n % 10;
    if (n != 0) {
      cout << "-" << A[n];
    }
  }
}
