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[사설]중동 확전… 韓 ‘안보-경제 복합위기’ 장기화 대비해야
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don’t let the complex notation scare you - the core idea is extremely simple. the derivative of a regex R and a character c is simply whatever is left to match after removing the first character.
Пьяный турист нанес тяжелую травму участвовавшей в Олимпиаде сноубордистке20:38