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

SOLUTION: COoLMp

PROBLEM: IQIHqbEhpVuNATp, GIJIHqbEhpzWb

SOLUTION: IHqbEhp

PROBLEM: DAKZAW, JMKZkU

SOLUTION:
KZ