#include <bits/stdc++.h>
using namespace std;
char s[30][20] = {{"zero"},    {"one"},       {"two"},      {"three"},
                  {"four"},    {"five"},      {"six"},      {"seven"},
                  {"eight"},   {"nine"},      {"ten"},      {"eleven"},
                  {"twelve"},  {"thirteen"},  {"fourteen"}, {"fifteen"},
                  {"sixteen"}, {"seventeen"}, {"eighteen"}, {"nineteen"},
                  {"twenty"}};
char v[20][20] = {{"twenty"}, {"thirty"},  {"forty"},  {"fifty"},
                  {"sixty"},  {"seventy"}, {"eighty"}, {"ninety"}};
int main() {
  int n;
  while (scanf("%d", &n) != EOF) {
    if (n <= 20)
      cout << s[n] << endl;
    else {
      int m, t;
      t = n % 10;
      m = n / 10;
      if (t != 0) {
        cout << v[m - 2] << "-" << s[t] << endl;
      } else
        cout << v[m - 2] << endl;
    }
  }
  return 0;
}
