#include <bits/stdc++.h>
using namespace std;
int main() {
  string oneVals[20] = {"zero",    "one",       "two",      "three",
                        "four",    "five",      "six",      "seven",
                        "eight",   "nine",      "ten",      "eleven",
                        "twelve",  "thirteen",  "fourteen", "fifteen",
                        "sixteen", "seventeen", "eighteen", "nineteen"};
  string tenVals[10] = {"twenty", "thirty",  "forty",  "fifty",
                        "sixty",  "seventy", "eighty", "ninety"};
  int num;
  scanf("%d", &num);
  if (num >= 0 && num <= 19) {
    printf("%s", oneVals[num].c_str());
  } else {
    int ones = num % 10;
    int tens = num / 10;
    printf("%s", tenVals[tens - 2].c_str());
    if (ones > 0) {
      printf("-%s", oneVals[ones].c_str());
    }
  }
}
