About pronunciation. The way I was first taught Russian cyrillic, ? was pronounced "shch," like in "hash check," and ? was the vowel in "sit." But the way my Russian professor says it, ? is "shshy," like a long, soft ?, and ? is like a German u-umlaut gliding to a short ?. Is the way my professor pronounces it just a feature of certain accents/dialects (in her case, Moscow), or is that for all Russian, or what?