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

SOLUTION: AwURXnxB

PROBLEM: XbjDHRCWxdPbhibUKn, SrpuPDHRCWxdPbKPWEXNWbZ

SOLUTION: DHRCWxdPb

PROBLEM: fJCTPahoGjVHTOunJ, mFeoGjVHTOsNBGCPg

SOLUTION:
oGjVHTO