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

[Q]: kWnjCoVmCSVuW, RILPKCoVmCSVbaOza
[A]: CoVmCSV


[Q]: fdinRdwwlntwqzYGhV, ZefonRdwwlntoWQbh
[A]: nRdwwlnt


[Q]: rcmRcPNY, byLRcPIhX
[A]:
RcP