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

Q: oDdulHNcCdgbRGxiBTxM, kDcCdgbRGnsJlvas

A: cCdgbRG
****
Q: bdCOjNchdKtvWzOI, FwejNchdKhEd

A: jNchdK
****
Q: HdzqluKTtIhTyAYaiv, iTTtIhTyAYaaAqvIx

A:
TtIhTyAYa
****