In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

Q: uDaqoOpUtLDdTGTO, ncIgBjDPqoOpUtLDdTNtiEyarDO

A: qoOpUtLDdT
****
Q: edjRAatlaiCmWkpqMh, qDZYVWCDTRAatlaiCmYH

A: RAatlaiCm
****
Q: oqJJhrczniGs, zFVhrczngywi

A:
hrczn
****