e like 'e' in "vowel" (schwa)
é like 'e' in "bed", usually the difference between a schwa and an e is not indicated in writing
i like 'i' in "thin"
o like 'ow' in "low", in open positions or like 'o' in "top" in close positions
u like 'oo' in "hoop", in open positions or like 'o' in “hope” in close positions