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

SOLUTION: DjCKcJ

PROBLEM: UTdardKNThdYrGKMqZPeg, mvrThdYrGKMlcCxBtak

SOLUTION: ThdYrGKM

PROBLEM: kSDRqaadVkEsnBCSyUcIics, kjBZkEsnBCSyUcBT

SOLUTION:
kEsnBCSyUc