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