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18: 10B 11B 12Ê 2B 13B 14B 21 a 28a 7B 13B 20B 21 a 28B 3B 11 a 17B 5B 10B 21B 24B 31B 14B 18B 20B 21 a 25B 27a 28B 7 2B 11B 12a 18B 19B 20B 23B 25El 26B 27B 30B 10B 20B 23B 27B 28B
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