[重点]主攻492705头,主攻491627尾.
1,排除163头,051百,169十,尾385.
2,铁卒:34.39,84,89.
3,三字现:342,347.392,397,842,847,892,897.
4,二定.4XX4,4XX9,9XX4.9XX9, 43XX, 48XX, 93XX, 98XX.
5,三定,43X4,43X9,48X4,48X9,93X4,93X9,98X4,98X9,435X,485X.
6,直码,4304.4309,4354,4359,4804.4809,4854,4859,9304,9309.