instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
zqwhMdAdXQfQCAmVNaYZm, toYMIwQeadAdXQfQCAmLyheFOv
answer:
dAdXQfQCAm


question:
vJtmxQmHEq, yobgAtmxQmMeoLz
answer:
tmxQm


question:
fUCHPUCDYaDSGEmIT, pltMPBfUCDYaDSeBR
answer:

UCDYaDS