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

Input: Consider Input: sbQJFbUtmnKaEJePFPeRM, QzfvkdZbUtmnKaEJNrWD

Output: bUtmnKaEJ


Input: Consider Input: HEVqGddewrNqiZ, iyvlddewrNXr

Output: ddewrN


Input: Consider Input: CByGwdeYTzGjZYsuokuXLCz, juVLzbdeYTzGjZYsYPgQfhOSTb


Output: deYTzGjZYs