[重点]主攻381657头,主攻271605尾.
1,排除402头,580百,382十,尾498.
2,铁卒:31,36,81,86.
3,三字现:134,139,184,189,634,639,684,689.
4,二定:3XX1,3XX6.8XX1,8XX6,0XX4,0XX9,5XX4,5XX9,XX46.
5,三定:3X41,3X46,3X91,3X96,8X41,8X46,8X91,8X96,0X14,0X69.
6,直码:3141,3146,3191,3196,8141.8146,8191,8196,8641,8646.