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

Q: XMtSwZVAHsNYhbyDm, asAVAHsNYhSPuNLrV

A: VAHsNYh
****
Q: gTjTwC, OUjTgM

A: jT
****
Q: KEUdUaceNNCJiYTVVN, WayUaceNNCJipx

A:
UaceNNCJi
****