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]: ysEUFPQpeaSMNjpfvLYAYUVbQawNqn, RGYcRtxMrvdsHqRIQpeaSMNjpfvLYAYUVbahmjaDCAd
[EX A]: ysEUFPaabefjlmnppqsuvvyyQawNqn, RGYcRtxMrvdsHqRIaabefjlmnppqsuvvyyahmjaDCAd

[EX Q]: AKzxFKwALnIhj, NEXYzxFKwAvJzd
[EX A]: AKafkwxzLnIhj, NEXYafkwxzvJzd

[EX Q]: LabWJp, hpbWut
[EX A]:
LabwJp, hpbwut