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 ㅐㅔ[ㅑㅐㅔ[ㅑㅐㅔ[ㅑㅐ
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''[DKF] wonders what all that was about?''

[RS]: An obvious drive-by scribble, most probably from Korea. The characters, except for the brackets, are ''jamo'', Korean letters, from which ''hangul'' syllable signs are built. The H-like structure is an A-I ligature, typically transliterated ''ae'' as in Daejon.