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

Input: Consider Input: haOsaSQcyodWhqQaC, BKLEUQcyodWhvVkmxBz

Output: QcyodWh


Input: Consider Input: ftvxfhsnJEygzV, JYxSfhsnJnIqkW

Output: fhsnJ


Input: Consider Input: YgDAGGbXdPFuKFyY, UKDzGbXdPFOYsdr


Output: GbXdPF


