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

Q: UiaECWZf, gRyaECWLGRl

A: aECW
****
Q: xfZYYDKEqoRRu, ztCeYYDKEqoPG

A: YYDKEqo
****
Q: bfgzvlaTcAUliSEyFk, iPjiTcAUliSBNwl

A:
TcAUliS
****