[重点]主攻273849头,主攻490538尾.
1,排除160头,162百,056十,271尾.
2,铁卒:20,25,70,75.
3,三字现:254,259,704,709,024,029,074,079.
4,二定:20XX,25XX,70XX,75XX,2XX4,2XX9,7XX4,7XX9,XX24,XX29.
5,三定:202X,207X,252X,257X,702X,707X,752X,757X,20X4,20X9.
6,直码:2024,2029,2074,2079,2524,2529,2574,2579,7024,7029.