TASK DEFINITION: In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
PROBLEM: QgkpBHsrfRYJCa, AdjbKLpBHsrfbpBC

SOLUTION: pBHsrf

PROBLEM: oZNKLmfxecDfkXEGFkRBYk, tReqkiExecDfkXEGtNZpJVRxC

SOLUTION: xecDfkXEG

PROBLEM: SfpmWiMSJoICAowrTiIs, WULmWiMSJoICKQd

SOLUTION:
mWiMSJoIC