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

Input: Consider Input: UovaYpHjYSQzrfsxRfvIZE, pUOFxIKOGQzrfsxRfvIjrza

Output: QzrfsxRfvI


Input: Consider Input: xMxyohPBlJIEBqghiMdBQPwq, xsBlJIEBqghlMosK

Output: BlJIEBqgh


Input: Consider Input: VURyJPlFNtHE, neJPlFNtXhpAm


Output: JPlFNt