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

SOLUTION: ycTyc

PROBLEM: CzkPtkpMTDeNZwCPbJJn, HzpMVDeNZwCPbJVOU

SOLUTION: DeNZwCPbJ

PROBLEM: upFYlPDeTAOhdlqnI, zbOvCzDFYlPDeTAOcskQuU

SOLUTION:
FYlPDeTAO