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

Input: Consider Input: HiEuutntEBpU, fdkqEuutntEBABdGZRND

Output: EuutntEB


Input: Consider Input: GFhJafTV, waHhJaji

Output: hJa


Input: Consider Input: NnGpfrLSPZiohbFI, ulSvfrLSPZioABxObCx


Output: frLSPZio