[重点]主攻493805头。主攻492738尾.
1,排除271头,054百,419十,尾051
2,铁卒:34.39,84,89.
3,三字现:340,309.804,809,354,359,854,859.
4,二定.X3X2,X3X9,X8X2.X8X9, X1X2, X1X9, X6X2, X6X9.
5,三定,X104.X109,X154,X159,X604,X609,X654,X659,31X4,31X9.
6,直码:8104.8109,8154,8159,8604.8609,8654,8659,8139,8639.