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

SOLUTION: tAmwMwcIR

PROBLEM: OezHeoe, ouUzHemU

SOLUTION: zHe

PROBLEM: xEEJXlSZQecryaTS, rqXlSZQechUuIqAa

SOLUTION:
XlSZQec