#include <bits/stdc++.h>
using namespace std;
int tostr(int x) {
  if (x == 0) return cout << "zero", 0;
  if (x >= 10 && x < 20) {
    switch (x) {
      case 10:
        return cout << "ten", 0;
      case 11:
        return cout << "eleven", 0;
      case 12:
        return cout << "twelve", 0;
      case 13:
        return cout << "thirteen", 0;
      case 14:
        return cout << "fourteen", 0;
      case 15:
        return cout << "fifteen", 0;
      case 16:
        return cout << "sixteen", 0;
      case 17:
        return cout << "seventeen", 0;
      case 18:
        return cout << "eighteen", 0;
      case 19:
        return cout << "nineteen", 0;
    }
  }
  int a = x % 10, b = x / 10;
  switch (b) {
    case 2: {
      cout << "twenty";
      break;
    }
    case 3: {
      cout << "thirty";
      break;
    }
    case 4: {
      cout << "forty";
      break;
    }
    case 5: {
      cout << "fifty";
      break;
    }
    case 6: {
      cout << "sixty";
      break;
    }
    case 7: {
      cout << "seventy";
      break;
    }
    case 8: {
      cout << "eighty";
      break;
    }
    case 9: {
      cout << "ninety";
      break;
    }
  }
  if (a != 0 && b != 0) cout << '-';
  switch (a) {
    case 1: {
      cout << "one";
      break;
    }
    case 2: {
      cout << "two";
      break;
    }
    case 3: {
      cout << "three";
      break;
    }
    case 4: {
      cout << "four";
      break;
    }
    case 5: {
      cout << "five";
      break;
    }
    case 6: {
      cout << "six";
      break;
    }
    case 7: {
      cout << "seven";
      break;
    }
    case 8: {
      cout << "eight";
      break;
    }
    case 9: {
      cout << "nine";
      break;
    }
  }
}
int main() {
  ios_base::sync_with_stdio(0);
  int n;
  cin >> n;
  tostr(n);
  return 0;
}
