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

Input: Consider Input: koddLvYmRXDUuUnW, GnqDYGmmRXDUuUquAnf

Output: mRXDUuU


Input: Consider Input: uqazNuZhdJhw, KbnrzNuZhBdp

Output: zNuZh


Input: Consider Input: nUGqBjDTUhthBPSI, hnxxhSlGqBjDTUaqq


Output: GqBjDTU