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]: ldnPvADM, SyPvAtIY
[EX A]: ldnapvDM, SyapvtIY

[EX Q]: jqRWpVkwluUnvIKBvS, bAhxcbtvikwluUnvIKBnaJi
[EX A]: jqRWpVbikklnuuvwvS, bAhxcbtvibikklnuuvwnaJi

[EX Q]: GWkiJn, YBkiZq
[EX A]:
GWikJn, YBikZq