instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
pIkAtJHVcvzzZVz, btWerNSHVcvzzZTz
answer:
HVcvzzZ


question:
haOsaSQcyodWhqQaC, BKLEUQcyodWhvVkmxBz
answer:
QcyodWh


question:
EkeLBa, RieLUM
answer:

eL