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

Input: Consider Input: VByrCcgcxCfPGDFqIWGloQZTMQf, OqfPGDFqIWGlalTCCkKkMf

Output: fPGDFqIWGl


Input: Consider Input: txJhzNeBj, qLJhzNesV

Output: JhzNe


Input: Consider Input: neXWnOhURfV, svnOhURBHor


Output: nOhUR