writer.println("</ul>")
            data.toSortedMap().forEach { (category, problems) ->
                writer.println("<a name=\"$category\"></a>")
                writer.println("<h2>$category</h2>")
                problems.forEach { (name, issues) ->
                    writer.println("<h3>In $name</h3>")
                    writer.println("<ul>")
                    issues.forEach {