@ @WW@ @ÖïÐaínÜaì@Þî†bjnÜa@ @ () [MAΘ 2008] ( ) 3 3: 4 [MAΘ 2008] ( ) . . BA 5 [MAΘ 2008] ( ) . DC AABBCC [MAΘ 2008] ( ) 15 . 6! = 90 2!× 2!× 2! ABC 4 () . 14 ( ) .