It's too late to change the kata design, it's been solved many times. (Also it teaches new c0ncept about arguments of functions, so why not?!)

Where would suggestions for future katas in the series go, if they don't go in the comments?

each third character came only after first two.
each second character came only after first one.

it'a like dependency 🤗

Suggestions are related only to the task they're left under. They're not for suggesting what should be included in some arbitrary future katas.

Not related to this kata.

From the description :

• there is a secret word
• you are given a list of strings which are three chars of the word in the order they are in the word
• those strings are not necessarily consecutive in the secret word
• determine the word

If

questionNotIssue

was the secrete word then you could be given strings like

qti
Niu
que

etc. to solve it.

http://tldp.org/LDP/abs/html/exitcodes.html