Hi. One alphabet is one letter in english but one syllable is one letter in korean . ex) buil/ding - 빌/딩 So one letter is consist of consonant + vowel + consonant or consonant + vowel or vowel +consonant or vowel If there is no beginning consonant like vowel + consonant or vowel, write "ㅇ" as begining consonant. ex) all - 올 "ㅇ"as begining consonant don't have a sound but you don't have to miss it. It is a common mistake of beginners. If you want to get more information, watch following korean lesson video . http://www.youtube.com/watch?v=0ZhOeA0RD9o&feature=relmfu