[重点]主攻274916头,主攻163805尾.
1,排除380头,053百,271十,497尾
2,铁卒:12.17,62,67.
3,三字现:124,129,174,179,624,629,674,679.
4,二定:4XX1,4XX6,9XX1,9XX6,2XX1,2XX6,,7XX1,7XX6.
5,三定:92X1,92X6,97X1,97X6,42X1,42X6,47X1,47X6,90X1,90X6.
6,直码:4201,4206,4251,4256,4701,4706,4751,4756,9201,9206.