#include <bits/stdc++.h>
using namespace std;
int n, dai, d;
char s[111], cf[11];
void indv(int so1) {
  if (so1 == 1) cout << "one";
  if (so1 == 2) cout << "two";
  if (so1 == 3) cout << "three";
  if (so1 == 4) cout << "four";
  if (so1 == 5) cout << "five";
  if (so1 == 6) cout << "six";
  if (so1 == 7) cout << "seven";
  if (so1 == 8) cout << "eight";
  if (so1 == 9) cout << "nine";
}
void solve() {
  int i, j, chuc, dv;
  chuc = n / 10;
  dv = n % 10;
  if (chuc == 0) {
    if (dv == 0)
      cout << "zero";
    else {
      indv(dv);
    }
  } else {
    if (chuc == 1) {
      if (dv == 0) cout << "ten";
      if (dv == 1) cout << "eleven";
      if (dv == 2) cout << "twelve";
      if (dv == 3) cout << "thirteen";
      if (dv > 3) {
        if (dv == 5)
          cout << "fifteen";
        else {
          if (dv == 8)
            cout << "eighteen";
          else {
            indv(dv);
            cout << "teen";
          }
        }
      }
    }
    if (chuc == 2) {
      cout << "twenty";
      if (dv > 0) {
        cout << "-";
        indv(dv);
      }
    }
    if (chuc == 3) {
      cout << "thirty";
      if (dv > 0) {
        cout << "-";
        indv(dv);
      }
    }
    if (chuc == 4) {
      cout << "forty";
      if (dv > 0) {
        cout << "-";
        indv(dv);
      }
    }
    if (chuc == 5) {
      cout << "fifty";
      if (dv > 0) {
        cout << "-";
        indv(dv);
      }
    }
    if (chuc == 6) {
      cout << "sixty";
      if (dv > 0) {
        cout << "-";
        indv(dv);
      }
    }
    if (chuc == 7) {
      cout << "seventy";
      if (dv > 0) {
        cout << "-";
        indv(dv);
      }
    }
    if (chuc == 8) {
      cout << "eighty";
      if (dv > 0) {
        cout << "-";
        indv(dv);
      }
    }
    if (chuc == 9) {
      cout << "ninety";
      if (dv > 0) {
        cout << "-";
        indv(dv);
      }
    }
  }
  cout << endl;
}
int main() {
  while (scanf("%d", &n) > 0) {
    solve();
  }
  return 0;
}
