#include <bits/stdc++.h>
int main() {
  int n, x, y;
  scanf("%d", &n);
  if (n == 0)
    printf("zero");
  else if (n == 1)
    printf("one");
  else if (n == 2)
    printf("two");
  else if (n == 3)
    printf("three");
  else if (n == 4)
    printf("four");
  else if (n == 5)
    printf("five");
  else if (n == 6)
    printf("six");
  else if (n == 7)
    printf("seven");
  else if (n == 8)
    printf("eight");
  else if (n == 9)
    printf("nine");
  else if (n == 10)
    printf("ten");
  else if (n == 11)
    printf("eleven");
  else if (n == 12)
    printf("twelve");
  else if (n == 13)
    printf("thirteen");
  else if (n == 14)
    printf("fourteen");
  else if (n == 15)
    printf("fifteen");
  else if (n == 16)
    printf("sixteen");
  else if (n == 17)
    printf("seventeen");
  else if (n == 18)
    printf("eighteen");
  else if (n == 19)
    printf("nineteen");
  else if (n == 20)
    printf("twenty");
  else if (n > 20) {
    x = n / 10;
    y = n % 10;
    if (x == 2)
      printf("twenty");
    else if (x == 3)
      printf("thirty");
    else if (x == 4)
      printf("forty");
    else if (x == 5)
      printf("fifty");
    else if (x == 6)
      printf("sixty");
    else if (x == 7)
      printf("seventy");
    else if (x == 8)
      printf("eighty");
    else if (x == 9)
      printf("ninety");
    if (y == 1)
      printf("-one");
    else if (y == 2)
      printf("-two");
    else if (y == 3)
      printf("-three");
    else if (y == 4)
      printf("-four");
    else if (y == 5)
      printf("-five");
    else if (y == 6)
      printf("-six");
    else if (y == 7)
      printf("-seven");
    else if (y == 8)
      printf("-eight");
    else if (y == 9)
      printf("-nine");
  }
  return 0;
}
