Placing words at the end of post information

What does one place in the 'subject' field of a post in order to put the desired text at the end of all the post information after post number? There's a bunch of threads on here for so called 'secrets' and triforce asshattery but nothing for the placement of words in post info. I have seen subject text in the middle of info too, so I'm fairly sure it can be done.

Many thanks in advance all

tl;dr - How do you make words AFTER post number in image boards

you can't