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

Input: Consider Input: ftvxfhsnJEygzV, JYxSfhsnJnIqkW

Output: fhsnJ


Input: Consider Input: VByrCcgcxCfPGDFqIWGloQZTMQf, OqfPGDFqIWGlalTCCkKkMf

Output: fPGDFqIWGl


Input: Consider Input: jJltgD, doltMZ


Output: lt