#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    int x,y,z;
    cin>>x;
    y=x/10;
    z=x%10;
    switch (y)
    {
    case 2:
         cout<<"twenty";
         break;
         case 3:
              cout<<"thirty";
              break;
              case 4:
                   cout<<"fourty";
                   break;
                   case 5:
                        cout<<"fivty";
                        break;
                        case 6:
                             cout<<"sixty";
                              break;
                        case 7:
                             cout<<"seventy";
                              break;
                        case 8:
                             cout<<"eighty";
                              break;
                        case 9:
                             cout<<"ninty";
                              break;
                              default :
                                      cout<<"no";
                                      break;
                              }
          switch (z)
          {
                 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;
                              default:
                              cout<<"no";
                              break;
                              }
                                    
                             
              
    system("PAUSE");
    return EXIT_SUCCESS;
}