I don't know how you would have learned to treat "ㅇ" like, but as you see, it is a blank circle. And that is exactly what is stands for. ㅇ means "empty sound." I'll tell you a cool rule, maybe you know this already. It works 100% of the time, and it has no irregulars or exceptions. If you have a word that has a consonant at the bottom, such as "꽃", with ㅊ being at the bottom. And if that is followed by a character with ㅇat the top, for example, "은," the botton consonant from the bottom would kick ㅇ out of its place and go inside, replacing it. So, 꽃은 is 꼬츤 반영 is 바녕 휘발유 is 휘바류 Do you get it? Kudos!!

Perfect.