#include <bits/stdc++.h>
using namespace std;
const int N = 0;
int k, x, n;
string s;
vector<int> v;
int main() {
  string a[] = {"zero", "one", "two",   "three", "four",
                "five", "six", "seven", "eight", "nine"};
  string b[] = {"",      "ten",   "twenty",  "thirty", "forty",
                "fifty", "sixty", "seventy", "eighty", "ninety"};
  cin >> s;
  if (s == "11") {
    printf("eleven\n");
    return 0;
  } else if (s == "12") {
    printf("twelve\n");
    return 0;
  } else if (s == "15") {
    printf("fifteen\n");
    return 0;
  } else if (s == "13") {
    printf("thirteen\n");
    return 0;
  } else if (s == "18") {
    printf("eighteen\n");
    return 0;
  }
  if (s.length() == 1) {
    cout << a[s[0] - '0'];
  } else {
    if (s[1] == '0') {
      cout << b[s[0] - '0'];
    } else if (s[0] == '1') {
      cout << a[s[1] - '0'] << "teen";
    } else {
      cout << b[s[0] - '0'] << "-" << a[s[1] - '0'];
    }
  }
  return 0;
}
