#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  int n;
  cin >> n;
  string ans = "";
  if (n / 10 == 0) {
    if (n == 0) {
      ans = "zero";
    } else if (n == 1) {
      ans = "one";
    } else if (n == 2) {
      ans = "two";
    } else if (n == 3) {
      ans = "three";
    } else if (n == 4) {
      ans = "four";
    } else if (n == 5) {
      ans = "five";
    } else if (n == 6) {
      ans = "six";
    } else if (n == 7) {
      ans = "seven";
    } else if (n == 8) {
      ans = "eight";
    } else if (n == 9) {
      ans = "nine";
    }
  } else {
    if (n == 10) {
      ans = "ten";
    } else if (n == 20) {
      ans = "twenty";
    } else if (n == 30) {
      ans = "thirty";
    } else if (n == 40) {
      ans = "forty";
    } else if (n == 50) {
      ans = "fifty";
    } else if (n == 60) {
      ans = "sixty";
    } else if (n == 70) {
      ans = "seventy";
    } else if (n == 80) {
      ans = "eighty";
    } else if (n == 90) {
      ans = "ninety";
    } else if (n == 11) {
      ans = "eleven";
    } else if (n == 12) {
      ans = "twelve";
    } else if (n == 13) {
      ans = "thirteen";
    } else if (n == 14) {
      ans = "fourteen";
    } else if (n == 15) {
      ans = "fifteen";
    } else if (n == 16) {
      ans = "sixteen";
    } else if (n == 17) {
      ans = "seventeen";
    } else if (n == 18) {
      ans = "eighteen";
    } else if (n == 19) {
      ans = "nineteen";
    } else {
      int first = n % 10;
      int second = n / 10;
      if (second / 10 == 0) {
        n = second;
        if (n == 0) {
          ans = "zero";
        } else if (n == 1) {
          ans = "one";
        } else if (n == 2) {
          ans += "twenty";
        } else if (n == 3) {
          ans = "thirty";
        } else if (n == 4) {
          ans = "forty";
        } else if (n == 5) {
          ans = "fifty";
        } else if (n == 6) {
          ans = "sixty";
        } else if (n == 7) {
          ans = "seventy";
        } else if (n == 8) {
          ans = "eighty";
        } else if (n == 9) {
          ans = "ninety";
        }
      }
      ans += "-";
      if (first / 10 == 0) {
        n = first;
        if (n == 0) {
          ans += "zero";
        } else if (n == 1) {
          ans += "one";
        } else if (n == 2) {
          ans += "two";
        } else if (n == 3) {
          ans += "three";
        } else if (n == 4) {
          ans += "four";
        } else if (n == 5) {
          ans += "five";
        } else if (n == 6) {
          ans += "six";
        } else if (n == 7) {
          ans += "seven";
        } else if (n == 8) {
          ans += "eight";
        } else if (n == 9) {
          ans += "nine";
        }
      }
    }
  }
  cout << ans << endl;
  return 0;
}
