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.

Example Input: KxsIGEnEiTvmqYIyLgu, QDmlgIGEnEiTvmerVcQdiAc
Example Output: KxseegiimntvqYIyLgu, QDmlgeegiimntverVcQdiAc

Example Input: rgszEhiguElUHlDuOjGGixp, DteiguElUHlDuNWTi
Example Output: rgszEhdeghilluuuOjGGixp, DtedeghilluuuNWTi

Example Input: JCAHvulxukjH, tNRzDvulxuKmlUu
Example Output:
JCAHluuvxkjH, tNRzDluuvxKmlUu