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

SOLUTION: mXnK

PROBLEM: MSxTzCpiJAplpzSvLlNJS, oScCpiJAplpNVrqkn

SOLUTION: CpiJAplp

PROBLEM: doMHSFwGpdOucHxRK, ngFqGpdOucHZHuOE

SOLUTION:
GpdOucH