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

Input: Consider Input: QRPOwtZATjDoJDdRNNSOH, wiafFMwpAjDoJDdRNNuCDZ

Output: jDoJDdRNN


Input: Consider Input: UldKHMpUYADGfEUGcSon, nPHMpUYADGfEKqHCLPmL

Output: HMpUYADGfE


Input: Consider Input: VoRzKdBELaJjcCeTH, dDzKdBELaRPORT


Output: zKdBELa