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

Input: Consider Input: SsshKSaCuNzXzSTgVc, DNNYLWahKSaCuNzXnAjtq

Output: hKSaCuNzX


Input: Consider Input: ztkWLUJQXxP, fYluOkWLUJKDX

Output: kWLUJ


Input: Consider Input: OBzHWjmkcgVGPyv, gCHWjmkcgVMq


Output: HWjmkcgV