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]: sKiwhEqCqZKpVIblkimXVWEEdXqwBKf, UGSlJMLrKpVIblkimXVjcXHRTVBs
[EX A]: sKiwhEqCqZbiikklmpvvxWEEdXqwBKf, UGSlJMLrbiikklmpvvxjcXHRTVBs

[EX Q]: PmJZEWv, QRJZEQZF
[EX A]: PmejzWv, QRejzQZF

[EX Q]: vKDWElExlKzGcNxCwGGIcEgrS, UMojPEdevQWElExlKzGcNiBhQJvau
[EX A]:
vKDceegkllnwxzxCwGGIcEgrS, UMojPEdevQceegkllnwxziBhQJvau