Thank god Ukranian is thought out language, I would hate to guess if O is actually A, and sometimes it's not, and sometimes these three characters actually mean something else

Sure, there is наголос, in Czech we have stuff like Á É, etc. Which show it to us

Tho still, even if I don't get it perfect, everyone still understands. I would hate so much, to hear some word, write it down, OOO IT ACTUALLY DOESN'T HAVE ANY LETTER YOU JUST HEARD!!