Solved by whitecolor

#	Title	# Solved	Avg. Tries
27866	문자와 문자열 STANDARD	60,138	1.48
27889	Exceptional School Name	4,570	1.41
30501	관공... 어찌하여 목만 오셨소...	1,616	1.22
31403	$A + B - C$	11,618	1.59

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