input: def generate_html_table(genre: str) -> str:
      """ Generate an HTML table displaying information about the top 10 bestselling books in a specific genre.
      >>> generate_html_table('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>1000</td></tr><tr><td>title2</td><td>author2</td><td>Fantasy</td><td>900</td></tr><tr><td>title3</td><td>author3</td><td>Fantasy</td><td>800</td></tr><tr><td>title4</td><td>author4</td><td>Fantasy</td><td>700</td></tr><tr><td>title5</td><td>author5</td><td>Fantasy</td><td>600</td></tr><tr><td>title6</td><td>author6</td><td>Fantasy</td><td>500</td></tr><tr><td>title7</td><td>author7</td><td>Fantasy</td><td>400</td></tr><tr><td>title8</td><td>author8</td><td>Fantasy</td><td>300</td></tr><tr><td>title9</td><td>author9</td><td>Fantasy</td><td>200</td></tr><tr><td>title10</td><td>author10</td><td>Fantasy</td><td>100</td></tr></table>'
      """
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>{1100 - i * 100}</td></tr>"
      table += "</table>"
      return table