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

Q: DwLGzwYOWjtzIunE, TTViSbkwYOWjtzNqUOOz

A: wYOWjtz
****
Q: fBpRXPkikQokGVeS, FwUbKXkikQokGos

A: kikQokG
****
Q: VNpzARNkxgsjD, oINkdzARNkMgWID

A:
zARNk
****