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??????????2-3???????9?Σ????3??????????27?????????????????
??????????3-4???????15?Σ????4??????????60?????????????????
??????????4-5???????21?Σ????5??????????105?????????????????
??????????5-6???????25?Σ????6??????????150?????????????????
??????????6-7???????30?Σ????7??????????210?????????????????
??????????7-8???????35?Σ????8??????????280?????????????????
??????????8-9???????40?Σ????9??????????360?????????????????
??????????9-10???????45?Σ????10??????????450?????????????????
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