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]: nsKYxx, fbKYig
[EX A]: nskyxx, fbkyig

[EX Q]: SfsGQOEKAwtUmHlsDFr, wDFpDlCbwyYvWsGQOEKAwtUmHlzABzUr
[EX A]: SfaeghklmoqstuwsDFr, wDFpDlCbwyYvWaeghklmoqstuwzABzUr

[EX Q]: fiyctjaxbSMOKqpxSxWxTCxAdfBuplpDKRVWDxbWI, JoOiBKRTeuKqpxSxWxTCxAdfBlsJ
[EX A]:
fiyctjaxbSMOabcdfkpqstwxxxxuplpDKRVWDxbWI, JoOiBKRTeuabcdfkpqstwxxxxlsJ