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

Input: Consider Input: jJSSBmflUyrEMLjSycA, YkmujkSSBmflUyrKKJZ

Output: SSBmflUyr


Input: Consider Input: goyZUz, QryZlD

Output: yZ


Input: Consider Input: WbykipaJXEbTOlpUONsqh, sacyykipaJXEbTTyCQnWdDn


Output: ykipaJXEbT