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

Input: Consider Input: SUgXyznbUQRpiLUTlRb, jlnwLTnbUQRpioUFyJ

Output: nbUQRpi


Input: Consider Input: UmYbssMbmsXkKQuzNasLOib, EMqlbmsXkKQuzNcyHrpZXOQW

Output: bmsXkKQuzN


Input: Consider Input: WdVbWTSifgvrPIal, cojPmWPWTSifgvrxHLNcB


Output: WTSifgvr