As described in my guide on how to get more art commissions from Reddit, this is the example script you can use as a start.
You need to have AutoHotKey installed for this to work. You need to edit the .txt files with your titles - as described in the guide - and launch the .ahk file. If you edit the .txt while the script is running, you must right-click its tray icon and hit 'reload script.' To automatically type a random title from your list, type
.rdt in any text input while the script runs.
It's nothing too advanced, you can customize the shortcut by changing the .rdt bit on line 16 of the .ahk file with any text editor