#include <bits/stdc++.h>
using namespace std;
long long x, x1, g, a[1000000], m, b[1000000], i, n, k = 10e7, p = 2001, h;
char c[10000], d[10000];
string s[20] = {"zero",    "one",     "two",       "three",    "four",
                "five",    "six",     "seven",     "eight",    "nine",
                "ten",     "eleven",  "twelve",    "thirteen", "fourteen",
                "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
string s1[8] = {"twenty", "thirty",  "forty",  "fifty",
                "sixty",  "seventy", "eighty", "ninety"};
int main() {
  cin >> n;
  if (n < 20)
    cout << s[n];
  else {
    if (n % 10 == 0)
      cout << s1[n / 10 - 2];
    else
      cout << s1[n / 10 - 2] << '-' << s[n % 10];
  }
}
