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

SOLUTION: SloqlddF

PROBLEM: AxAmDG, LTAmEV

SOLUTION: Am

PROBLEM: oHZAXsUNVtcQDPbDJT, vRTBCXsUNVtcQmlZ

SOLUTION:
XsUNVtcQ