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

WTnsmP, INnsIM
ns

VRXUhOYfTul, JqZUhOYKq
UhOY

sfdNIxIIluNXQGHUuOUJEZ, vuGFrLtyzWNIxIIluNXQLyAPiK

NIxIIluNXQ