Interchangeable ch/sh and k/t characters

[ololololo]

Pairs of letters - ch/sh and k/t, not bigrams.

I don’t understand your point of view.
The way I see it, there are two combinations and two individual characters.
But they aren’t the same as, for example, ‘9’ being written as ‘us’. Here, it’s an abbreviation and not a ‘g’.
You need to understand everything, because nothing is really the same.
So ‘4’ and ‘q’ aren’t the same.
I can already hear you saying, ‘It’s the same thing.’
But it isn’t, because the truth is, it’s already been done that way.

That is cryptology.

I didn't understand what these examples were for. Apparently, we need to think more simply  The only thing I wanted to say is that there are many words in the manuscript that differ only in one letter, ch/sh and k/t, respectively. If you still don't understand, then I meant that if there is okedy, then there is otedy; if there is cheody, then there is sheody.