Teacher: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.
Teacher: Now, understand the problem? Solve this instance: BKRdzudSTRAqslmmyxLsJc, HKlRudSTRAqslmmyxpdSWDzJgmF
Student:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
BKRdzadlmmqrsstuxyLsJc, HKlRadlmmqrsstuxypdSWDzJgmF