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

SOLUTION: yALRSDknU

PROBLEM: ftvxfhsnJEygzV, JYxSfhsnJnIqkW

SOLUTION: fhsnJ

PROBLEM: BfCCzPNLBbwCoxMVAG, vhwNLBbwCbH

SOLUTION:
NLBbwC