instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
wcJmSloqlddFOfv, szhUIAqzSloqlddFDJz
answer:
SloqlddF


question:
ylyLVUjsmMrXMFAPDGIZsHq, cYymMrXMFAPjm
answer:
mMrXMFAP


question:
dMsVYW, xVsVXi
answer:

sV