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

SOLUTION: CjZDoRR

PROBLEM: IQIHqbEhpVuNATp, GIJIHqbEhpzWb

SOLUTION: IHqbEhp

PROBLEM: IsYzNcitdqGlAgMpSjjEqJPot, UAZiCdqGlAgMpSdUOb

SOLUTION:
dqGlAgMpS