The letters of the Korean alphabet. These are almost never seen alone, generally appearing in groups of three as part of a Hangul syllable. The Jamo are divided into three catagories (with considerable overlap between the first and third), the choseong -- initial consonants, the jungseong -- medial vowels, and the jongseong -- final consonants. A syllable is composed by placing a choseong glyph in the upper left of an em-square, a jungseong in the upper right, and optionally a jongseong in the lower portion of the square.
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