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: GrvtMjEvRlmN, ifGOWMjEvRPSOZK

A: MjEvR
****
Q: cKCXpfol, fyXpfWd

A:
Xpf
****