In this task, you are given two strings A,B. You must perform the following operations to generate the required output list: (i) Find the longest common substring in the strings A and B, (ii) Convert this substring to all lowercase and sort it alphabetically, (iii) Replace the substring at its respective positions in the two lists with the updated substring.

[EX Q]: gjpQAfZCELgkHmZxdqtswQfXEPCgxUWExk, URswLZoqjKhamZxdqtswQfXEPCgFCFSjM
[EX A]: gjpQAfZCELgkHcdefgmpqqstwxxzxUWExk, URswLZoqjKhacdefgmpqqstwxxzFCFSjM

[EX Q]: yuxHtZ, JsxHBr
[EX A]: yuhxtZ, JshxBr

[EX Q]: QKUUBj, jEUUMD
[EX A]:
QKuuBj, jEuuMD