instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
tyVlHfTPLRSdFilXnSfqQ, bkTPLRSdFiMgXC
answer:
TPLRSdFi


question:
HorIyjpfBFmKZQUIEoP, AcWOaOgVPmyjpfBFmKZQPFYiI
answer:
yjpfBFmKZQ


question:
arTPiKzsZCrcigbdXfb, zGzsZCrciIl
answer:

zsZCrci