you can differ them by the right pronunciation of each character... ㅐㅔ .. kinda similar "ㅐ (ae)" as in "A" in HAND. "ㅔ (e) " as in "E" in SET. for ㅒㅖsimilar with ㅐㅔ (yae, ye) just add "Y" when you pronounce it. ㅗ ㅓ "ㅗ (o) " as in "O" in HOME "ㅓ (eo)" as in "AW" in SAW as well as ㅛ ㅕ(yo,yeo) add "Y" when pronouncing it.^^