#include <bits/stdc++.h>
int main() {
  int s, b, a;
  scanf("%d", &s);
  b = s % 10;
  a = (s - b) / 10;
  if (a == 1) {
    if (b == 0) printf("ten");
    if (b == 1) printf("eleven");
    if (b == 2) printf("twelve");
    if (b == 3) printf("thirteen");
    if (b == 4) printf("fourteen");
    if (b == 5) printf("fifteen");
    if (b == 6) printf("sixteen");
    if (b == 7) printf("seventeen");
    if (b == 8) printf("eighteen");
    if (b == 9) printf("nineteen");
  }
  if (a >= 2) {
    if (a == 2) printf("twenty");
    if (a == 3) printf("thirty");
    if (a == 4) printf("forty");
    if (a == 5) printf("fifty");
    if (a == 6) printf("sixty");
    if (a == 7) printf("seventy");
    if (a == 8) printf("eighty");
    if (a == 9) printf("ninety");
    if (b == 1) printf("-one");
    if (b == 2) printf("-two");
    if (b == 3) printf("-three");
    if (b == 4) printf("-four");
    if (b == 5) printf("-five");
    if (b == 6) printf("-six");
    if (b == 7) printf("-seven");
    if (b == 8) printf("-eight");
    if (b == 9) printf("-nine");
  }
  if (a == 0) {
    if (b == 0) printf("zero");
    if (b == 1) printf("one");
    if (b == 2) printf("two");
    if (b == 3) printf("three");
    if (b == 4) printf("four");
    if (b == 5) printf("five");
    if (b == 6) printf("six");
    if (b == 7) printf("seven");
    if (b == 8) printf("eight");
    if (b == 9) printf("nine");
  }
  return 0;
}
