[重点] 4938/X/X/1450千位排除16,百位排除50,十位排除27,个位排除27.二定范围: 491638/X/X/051438.两数组合:31XX,36XX,81XX,86XX,4XX4,4XX1,3XX5,8XX0.
三数组合:475X,31X5,36X5,81X0,86X0.
范围直码: 千位493850,百位271638,十位504936,个位051438.