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

SOLUTION: SEm

PROBLEM: GrvtMjEvRlmN, ifGOWMjEvRPSOZK

SOLUTION: MjEvR

PROBLEM: SNiVCjODQU, wjVCjODhzb

SOLUTION:
VCjOD