[重点]主攻271638头,主攻054938尾.
1,排除490头,270百,164十,尾167
2,铁卒:23.28,73,78.
3,三字现:230,235.280,285,307,735,780,785.
4,二定.1XX4,1XX9,6XX4,6XX9,2XX0,2XX5,7XX0,7XX5.
5,三定,2X30,2X35,2X80,2X85,7X30,7X35,7X80,7X85,5X23,5X28.
6,直码:2330,2335,2380,2385,2880.2885,2830,2835,7330,7335.