[重点]主攻493827头,主攻492738尾.
1,排除051头,382百,490十,尾051
2,铁卒:41.46,91,96.
3,三字现:421,426.471,476,921.926,971,976.463.
4,二定.X41X,X46X,X91X.X96X,X4X4,X4X9,X9X4,X9X9.
5,三定,X414.X419,X464,X469,X914,X919,X964,X969,241X,246X.
6,直码:2414.2419,2464,2469,2914.2919,2964,2969.7414,7419.