Quote Originally Posted by rainbowworrier
They fail to mention what these vowels sound like if you put a й after them.
They sound the same or almost the same because vowels are like the syllable nuclei here.

So I am wondering, do all these combinations exist? ай эй ый ой уй яй ей ий ёй юй? Do they sound different in stressed and unstressed positions?
Almost every combination is possible if we take simple patterns.

I hardly imagine the use of them in the unstressed positions... If there are some, I think that they sound slightly different.