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

Input: Consider Input: NmtypJ, tQtyZD

Output: ty


Input: Consider Input: yjoJzBGdwfOhsceoOpoap, uSLMdBGdwfOhsIQHBijd

Output: BGdwfOhs


Input: Consider Input: IGKuXXVRROTzSeLtrBIVSj, KNxvPoVRROTzSeYLdFz


Output: VRROTzSe