1. At least 9 more tables need to be placed in the page. I tried to modify the code, but to no avail. Please show me how to add another table. I may be able to do the rest.

2. The first 'show letters' button works, but not the second and third 'show letters' buttons, as I code the in html, to demonstrate my intention. I want them to work as the first one.

More tables need to be placed in this page.