instruction:
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.
question:
aagVBWgGZqxfSUAoPzDjp, BKWSVBWgGZqxfSUAoxUqBW
answer:
aagabfggoqsuvwxzPzDjp, BKWSabfggoqsuvwxzxUqBW


question:
qyECvyU, GrGECvxC
answer:
qycevyU, GrGcevxC


question:
QNELUQBFKQtwZTiTYKBNNnbJgH, PgFKQtwZTiTYKBNNnOcCjzbnunDseupw
answer:

QNELUQBbfikknnnqtttwyzbJgH, PgbfikknnnqtttwyzOcCjzbnunDseupw