16 17

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16 17
16 17

16 17
15 A 16 D 17 B

16,17, 16,17, 16,17, 16,17, 16 17 16~17 16 17 16 17 16 17 16,17, 16 17 16 17 16 17 16 17 16 17 16 17 16,17, 16,17,