instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
fWJdaAfOCfejXZvidHM, gOpfOCfejXZbtLvSLZI
answer:
fOCfejXZ


question:
HSsyZzZLZAAq, MFEZzZLJC
answer:
ZzZL


question:
FTInER, OhInhd
answer:

In