[重点]主攻493857头,主攻491623尾.
1,排除016头,491百,249拾,058尾.
2,铁卒:40,45,90,95.
3,三字现:410,145,460,465,910,915,690,695.
4,二定:40XX,45XX,90XX,95XX,42XX,47XX,92XX,97XX,X01X,X06X
5,三定:421X,426X,471X,476X,921X,926X,971X,976X,40X4,45x4
6,直码:4214,4219,4264,4269,4714,4719,4764,4769,4004,4504,4509