#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  scanf("%d", &n);
  if (n == 0 || n == 1 || n == 2 || n == 3 || n == 4 || n == 5 || n == 6 ||
      n == 7 || n == 8 || n == 9 || n == 10 || n == 11 || n == 12 || n == 13 ||
      n == 14 || n == 15 || n == 16 || n == 17 || n == 18 || n == 19 ||
      n == 20 || n == 30 || n == 40 || n == 50 || n == 60 || n == 70 ||
      n == 80 || n == 90) {
    switch (n) {
      case 0:
        printf("zero\n");
        break;
      case 1:
        printf("one\n");
        break;
      case 2:
        printf("two\n");
        break;
      case 3:
        printf("three\n");
        break;
      case 4:
        printf("four\n");
        break;
      case 5:
        printf("five\n");
        break;
      case 6:
        printf("six\n");
        break;
      case 7:
        printf("seven\n");
        break;
      case 8:
        printf("eight\n");
        break;
      case 9:
        printf("nine\n");
        break;
      case 10:
        printf("ten\n");
        break;
      case 11:
        printf("eleven\n");
        break;
      case 12:
        printf("twelve\n");
        break;
      case 13:
        printf("thirteen\n");
        break;
      case 14:
        printf("fourteen\n");
        break;
      case 15:
        printf("fifteen\n");
        break;
      case 16:
        printf("sixteen\n");
        break;
      case 17:
        printf("seventeen\n");
        break;
      case 18:
        printf("eighteen\n");
        break;
      case 19:
        printf("nineteen\n");
        break;
      case 20:
        printf("twenty\n");
        break;
      case 30:
        printf("thirty\n");
        break;
      case 40:
        printf("forty\n");
        break;
      case 50:
        printf("fifty\n");
        break;
      case 60:
        printf("sixty\n");
        break;
      case 70:
        printf("seventy\n");
        break;
      case 80:
        printf("eighty\n");
        break;
      case 90:
        printf("ninety\n");
        break;
    }
  } else {
    string str, s1, s2;
    if (n % 10 == 1) s2 = "one";
    if (n % 10 == 2) s2 = "two";
    if (n % 10 == 3) s2 = "three";
    if (n % 10 == 4) s2 = "four";
    if (n % 10 == 5) s2 = "five";
    if (n % 10 == 6) s2 = "six";
    if (n % 10 == 7) s2 = "seven";
    if (n % 10 == 8) s2 = "eight";
    if (n % 10 == 9) s2 = "nine";
    if ((n / 10) % 10 == 2) s1 = "twenty";
    if ((n / 10) % 10 == 3) s1 = "thirty";
    if ((n / 10) % 10 == 4) s1 = "forty";
    if ((n / 10) % 10 == 5) s1 = "fifty";
    if ((n / 10) % 10 == 6) s1 = "sixty";
    if ((n / 10) % 10 == 7) s1 = "seventy";
    if ((n / 10) % 10 == 8) s1 = "eighty";
    if ((n / 10) % 10 == 9) s1 = "ninety";
    str = s1 + "-" + s2;
    cout << str << endl;
  }
  return 0;
}
