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

Q: dReySjyqecU, loSjyqiRl

A: Sjyq
****
Q: LJJvLTK, jpFJvLqh

A: JvL
****
Q: jnKqRsdppRKfluNSxg, dTiziMCdppRKflWZE

A:
dppRKfl
****