teenagers belong to at least one club. There are 3 clubs, chess, drama and art. 6 of the teenagers belong to only the art club, 5 of the teenagers belong to all 3 clubs. 2 of the teenagers belong to the chess and art clubs but not to the drama club.  15 of the teenagers belong to the art club.  2 of the teenagers belong only to the chess club.  3 of the teenagers belong only to the drama club. How many students do chess and drama but not art? How many students belong to the chess club?

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