#include <bits/stdc++.h>
using namespace std;
long long int n;
string yk[20] = {"zero",    "one",     "two",       "three",    "four",
                 "five",    "six",     "seven",     "eight",    "nine",
                 "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                 "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
string dh[10] = {"",      "",      "twenty",  "thirty", "forty",
                 "fifty", "sixty", "seventy", "eighty", "ninety"};
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  cin >> n;
  if (n < 20)
    cout << yk[n];
  else if (n % 10 == 0)
    cout << dh[n / 10];
  else
    cout << dh[n / 10] << '-' << yk[n % 10];
}
