instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
HorIyjpfBFmKZQUIEoP, AcWOaOgVPmyjpfBFmKZQPFYiI
answer:
yjpfBFmKZQ


question:
SsshKSaCuNzXzSTgVc, DNNYLWahKSaCuNzXnAjtq
answer:
hKSaCuNzX


question:
dXpgJnAeNSRJ, WxtOgJnAejTFi
answer:

gJnAe