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

Input: Consider Input: yQRDycTycwH, ImycTycrR

Output: ycTyc


Input: Consider Input: lPhVhAQZWJDrvzcEaGEwKgZAuJI, qIJDrvzcEaGDRCRrB

Output: JDrvzcEaG


Input: Consider Input: OAglOXbmuADnVVPVI, IgXbmuADjM


Output: XbmuAD