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

SOLUTION: fPGDFqIWGl

PROBLEM: pJqqIW, Ivqqxw

SOLUTION: qq

PROBLEM: jlKxhyrfOwvXbuTmB, YKrCOPpJarfOwvXbuTzUcNw

SOLUTION:
rfOwvXbuT