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

Input: Consider Input: uHGHiARtdJbuG, OdZmiARtdrhC

Output: iARtd


Input: Consider Input: IVnbnqBqdPcXfHotUzCYoaGQy, PAlyypBRRBqdPcXfHotpZs

Output: BqdPcXfHot


Input: Consider Input: pmInZkwTJCwlWOnNKmzgRYCEoq, AkBgtmFZJCwlWOnNKmANCkmQiu


Output: JCwlWOnNKm