Similar to those ones. Rejected by copyright on SS and IS as creative content.
Thanks that makes the question easier to understand.
Maybe SS stopped accepting those, there are 63 pages of letters, spelling things, the first pages, if you looked at the link, are block letter or tiles. Some are Editorial, but not all. You can test for yourself, get some different letters, make a similar concept and see what happens? But don't use Scrabble tiles...
They will be acceptable use.