#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n >= 0 && n <= 9) {
    if (n == 0) {
      cout << "zero";
    }
    if (n == 1) {
      cout << "one";
    }
    if (n == 2) {
      cout << "two";
    }
    if (n == 3) {
      cout << "three";
    }
    if (n == 4) {
      cout << "four";
    }
    if (n == 5) {
      cout << "five";
    }
    if (n == 6) {
      cout << "six";
    }
    if (n == 7) {
      cout << "seven";
    }
    if (n == 8) {
      cout << "eight";
    }
    if (n == 9) {
      cout << "nine";
    }
  }
  switch (n) {
    case 10:
      cout << "ten";
      break;
    case 11:
      cout << "eleven";
      break;
    case 12:
      cout << "twelve";
      break;
    case 13:
      cout << "thirteen";
      break;
    case 14:
      cout << "fourteen";
      break;
    case 15:
      cout << "fifteen";
      break;
    case 16:
      cout << "sixteen";
      break;
    case 17:
      cout << "seventeen";
      break;
    case 18:
      cout << "eighteen";
      break;
    case 19:
      cout << "nineteen";
      break;
  }
  if (n == 20) {
    cout << "twenty";
  }
  if (n == 50) {
    cout << "fifty";
  }
  switch (n) {
    case 21:
      cout << "twenty-one";
      break;
    case 22:
      cout << "twenty-two";
      break;
    case 23:
      cout << "twenty-three";
      break;
    case 24:
      cout << "twenty-four";
      break;
    case 25:
      cout << "twenty-five";
      break;
    case 26:
      cout << "twenty-six";
      break;
    case 27:
      cout << "twenty-seven";
      break;
    case 28:
      cout << "twenty-eight";
      break;
    case 29:
      cout << "twenty-nine";
      break;
    case 30:
      cout << "thirty";
      break;
    case 31:
      cout << "thirty-one";
      break;
    case 32:
      cout << "thirty-two";
      break;
    case 33:
      cout << "thirty-three";
      break;
    case 34:
      cout << "thirty-four";
      break;
    case 35:
      cout << "thirty-five";
      break;
    case 36:
      cout << "thirty-six";
      break;
    case 37:
      cout << "thirty-seven";
      break;
    case 38:
      cout << "thirty-eight";
      break;
    case 39:
      cout << "thirty-nine";
      break;
    case 40:
      cout << "forty";
      break;
    case 41:
      cout << "forty-one";
      break;
    case 42:
      cout << "forty-two";
      break;
    case 43:
      cout << "forty-three";
      break;
    case 44:
      cout << "forty-four";
      break;
    case 45:
      cout << "forty-five";
      break;
    case 46:
      cout << "forty-six";
      break;
    case 47:
      cout << "forty-seven";
      break;
    case 48:
      cout << "forty-eight";
      break;
    case 49:
      cout << "forty-nine";
      break;
  }
  switch (n) {
    case 51:
      cout << "fifty-one";
      break;
    case 52:
      cout << "fifty-two";
      break;
    case 53:
      cout << "fifty-three";
      break;
    case 54:
      cout << "fifty-four";
      break;
    case 55:
      cout << "fifty-five";
      break;
    case 56:
      cout << "fifty-six";
      break;
    case 57:
      cout << "fifty-seven";
      break;
    case 58:
      cout << "fifty-eight";
      break;
    case 59:
      cout << "fifty-nine";
      break;
    case 60:
      cout << "sixty";
      break;
    case 61:
      cout << "sixty-one";
      break;
    case 62:
      cout << "sixty-two";
      break;
    case 63:
      cout << "sixty-three";
      break;
    case 64:
      cout << "sixty-four";
      break;
    case 65:
      cout << "sixty-five";
      break;
    case 66:
      cout << "sixty-six";
      break;
    case 67:
      cout << "sixty-seven";
      break;
    case 68:
      cout << "sixty-eight";
      break;
    case 69:
      cout << "sixty-nine";
      break;
    case 70:
      cout << "seventy";
      break;
    case 71:
      cout << "seventy-one";
      break;
    case 72:
      cout << "seventy-two";
      break;
    case 73:
      cout << "seventy-three";
      break;
    case 74:
      cout << "seventy-four";
      break;
    case 75:
      cout << "seventy-five";
      break;
    case 76:
      cout << "seventy-six";
      break;
    case 77:
      cout << "seventy-seven";
      break;
    case 78:
      cout << "seventy-eight";
      break;
    case 79:
      cout << "seventy-nine";
      break;
    case 80:
      cout << "eighty";
      break;
    case 81:
      cout << "eighty-one";
      break;
    case 82:
      cout << "eighty-two";
      break;
    case 83:
      cout << "eighty-three";
      break;
    case 84:
      cout << "eighty-four";
      break;
    case 85:
      cout << "eighty-five";
      break;
    case 86:
      cout << "eighty-six";
      break;
    case 87:
      cout << "eighty-seven";
      break;
    case 88:
      cout << "eighty-eight";
      break;
    case 89:
      cout << "eighty-nine";
      break;
    case 90:
      cout << "ninety";
      break;
    case 91:
      cout << "ninety-one";
      break;
    case 92:
      cout << "ninety-two";
      break;
    case 93:
      cout << "ninety-three";
      break;
    case 94:
      cout << "ninety-four";
      break;
    case 95:
      cout << "ninety-five";
      break;
    case 96:
      cout << "ninety-six";
      break;
    case 97:
      cout << "ninety-seven";
      break;
    case 98:
      cout << "ninety-eight";
      break;
    case 99:
      cout << "ninety-nine";
      break;
  }
}
