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

TTagIJmzrOTdnKr, UONmtdHJmzrOTduWo
JmzrOTd

XMtSwZVAHsNYhbyDm, asAVAHsNYhSPuNLrV
VAHsNYh

kNZIfWifrYmcRjFqfstmh, fNDhIKBjYmcRjFqfsaNftWS

YmcRjFqfs