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

Input: Consider Input: zeuyZKwvIOfx, BlmZKwvspUt

Output: ZKwv


Input: Consider Input: gTjTwC, OUjTgM

Output: jT


Input: Consider Input: gmFaPmbpDUhZUwHVL, dMfGiIPmbpDUhZfWZvYOP


Output: PmbpDUhZ