instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
jyJrDIhxJtWbnooEXZ, uyXifNCIhxJtWbnVCUrt
answer:
IhxJtWbn


question:
uHGHiARtdJbuG, OdZmiARtdrhC
answer:
iARtd


question:
ScUCglVzZFPjLVofNHOumU, mNodEXwpZFPjLVofYfSnBM
answer:

ZFPjLVof