#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;
}

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