[重点]主攻273816头,主攻054216尾.
1,排除054头,035百,382十,尾387
2,铁卒:21.26,71,76.
3,三字现:214,219.264,269,714,719,764,769.
4,二定.2X1X,2X6X,7X1X.7X6X,4X1X,4X6X,9X1X,9X6X.
5,三定,211X.216X,261X,266X,711X,716X,761X,766X,21X0,21X5.
6,直码:2110.2115,2160,2165,2610.2615,2660,2665,7110,7115.