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: wYhGWdRC, cFGWdHEy

A: GWd
****
Q: tpxuSleZTujWC, eeVopuSleZHFDto

A:
uSleZ
****