input: 
  def generate_html_table_for_top_books(genre: str) -> str:
      """Generate an HTML table that displays information about the top 10 bestselling books in a specific genre.
      >>> generate_html_table_for_top_books('Fantasy') == '<table><tr><th>Title</th><th>Author</th><th>Genre</th><th>Sales</th></tr><tr><td>Title1</td><td>Author1</td><td>Fantasy</td><td>100000</td></tr><tr><td>Title2</td><td>Author2</td><td>Fantasy</td><td>90000</td></tr><tr><td>Title3</td><td>Author3</td><td>Fantasy</td><td>80000</td></tr><tr><td>Title4</td><td>Author4</td><td>Fantasy</td><td>70000</td></tr><tr><td>Title5</td><td>Author5</td><td>Fantasy</td><td>60000</td></tr><tr><td>Title6</td><td>Author6</td><td>Fantasy</td><td>50000</td></tr><tr><td>Title7</td><td>Author7</td><td>Fantasy</td><td>40000</td></tr><tr><td>Title8</td><td>Author8</td><td>Fantasy</td><td>30000</td></tr><tr><td>Title9</td><td>Author9</td><td>Fantasy</td><td>20000</td></tr><tr><td>Title10</td><td>Author10</td><td>Fantasy</td><td>10000</td></tr></table>'
      True
      """
  
output:     table = "<table><tr><th>Title</th><th>Author</th><th>Genre</th><th>Sales</th></tr>"
      for i in range(1, 11):
          table += f"<tr><td>Title{i}</td><td>Author{i}</td><td>{genre}</td><td>{110000 - i * 10000}</td></tr>"
      table += "</table>"
      return table