You are provided with an example:
fair game = FOSPSTFS
want more = FKUAIETO
Figure out the word:
I understand how this looks. However, there are some points one needs to consider.
The coding rule is very simple. It's not something out of the left field. After carefully looking at the example, I believe it's possible to figure it out fairly quickly.
The coding itself for a single word is done by hand in two minutes or less.
Decoding might be harder, but once you figure out the rule, it is possible, as I checked myself. Computer is not necessary, but would make the process faster.
And the most important thing - this 'cipher' has no key. (It's probably not a cipher then, if so, I apologise).