https://en.wikipedia.org/wiki/Hangul#/media/File:Hangeul_let... suggests that ㅔ represents 'e' and 'ㅐ' represents 'ae'. The differences between these sounds may be difficult for someone who isn't accustom to the sounds to distinguish.
Compare the Japanese with the difficulty of 'l' vs 'r'. And an obligatory Babylon 5 scene with Zathras - https://youtu.be/1j-76eLz1hc?t=1m40s