[重点]主攻052749头,主攻490387尾.
1,排除163头,380百,053十,尾165.
2,铁卒:04,09,54,59.
3,三字现:041,046,091,096,541,546,591,596.
4,二定:4XX4,4XX9.9XX4,9XX9,0XX4,0XX9,5XX4,,5XX9,5X1X.
5,三定:4X14,4X19,4X64,4X69,9X14,9X19,9X64,9X69,0X19,5X19.
6,直码:4214,4219,4264,4269,4714,4719,4764,4769,9214,9219.