#include <iostream>
using namespace std;
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] = {"", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"};
int main()
{
	ios::sync_with_stdio(false);
	int n;
	cin >> n;
	if (n < 20)
		cout << s[n] << endl;
	else if (n % 10 == 0)
		cout << t[n / 10] << endl;
	else
		cout << t[n / 10] << "-" << s[n % 10] << endl;
	return 0;
}