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0, 0, 0, 0, 1, 1, 0, 0, 2, 2, 1, 1, 3, 3, 2, 2, 5, 5, 3, 3, 7, 7, 5, 5, 9, 9, 7, 7, 12, 12, 9, 9, 15, 15, 12, 12, 18, 18, 15, 15, 22, 22, 18, 18, 26, 26, 22, 22, 30, 30, 26, 26, 35, 35, 30, 30, 40, 40, 35, 35, 45, 45, 40, 40, 51, 51, 45, 45, 57, 57, 51, 51
(列表;图表;参考;听;历史;文本;内部格式)
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