[重点]主攻273805头,主攻163827尾.
1,排除496头,497百,163十,尾059
2,铁卒:71,76,74,79.
3,三字现:741,746.791,796,521.526,571,576.579.
4,二定.X1X1,X1X6,X6X1.X6X6,X3X1,X3X6,X8X1,X8X6.
5,三定,71X1,71X6,76X1,76X6,21X1,21X6,76X1,76X6,73X1,73X6.
6,直码:7141.7146,7191,7196,7641.7646,7691,7696.2141,2146.