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

Input: Consider Input: yRhCObvPZYoKUoQnyaatR, NHzLJYPZYoKUoQnJnIsZxC

Output: PZYoKUoQn


Input: Consider Input: pqFpUjQGiofBOjfYkRW, pQMnCFlhFpUjQGiofbc

Output: FpUjQGiof


Input: Consider Input: iLtMoqAIE, leAMoqOJ


Output: Moq