#include <bits/stdc++.h>
using namespace std;
#pragma gcc optimize("ofast");
#pragma g++ optimize("ofast");
const int maxn = 1e3;
string s[20] = {"zero",    "one",     "two",       "three",    "four",
                "five",    "six",     "seven",     "eight",    "nine",
                "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
string t[10] = {"",      "ten",   "twenty",  "thirty", "forty",
                "fifty", "sixty", "seventy", "eighty", "ninety"};
int n;
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  cin >> n;
  if (n >= 10)
    if (n % 10 == 0)
      cout << t[n / 10];
    else if (n / 10 >= 2)
      cout << t[n / 10] << '-' << s[n % 10];
    else
      cout << s[n];
  else
    cout << s[n];
  return 0;
}
