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

Input: Consider Input: wNiHcaiUPHnjp, aSTmjcaiUPHFzOu

Output: caiUPH


Input: Consider Input: pIkAtJHVcvzzZVz, btWerNSHVcvzzZTz

Output: HVcvzzZ


Input: Consider Input: jLRYmmJDFTENcXRQxNr, CWYSDBmmJDFTENcXUBZOn


Output: mmJDFTENcX