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

Input: Consider Input: UCbReSfuLcbzmBCl, snQRReSfuLcbzmjqVPSdpp

Output: ReSfuLcbzm


Input: Consider Input: wbdHVigIkjNkuAmbr, iSgIkjNkQYyn

Output: gIkjNk


Input: Consider Input: KZXNoofVWEvhYKDoJXTjjJNGp, CeOfEvhYKDoJXNdGrSp


Output: EvhYKDoJX