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

Input: Consider Input: XmiLktrUjJDOCJ, UIKrUjJDOQsR

Output: rUjJDO


Input: Consider Input: cCDTMXjGMNikONun, jpcMXjGMNizBEWQzT

Output: MXjGMNi


Input: Consider Input: ozyXauPJ, mSNyXapu


Output: yXa