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

SOLUTION: BGdwfOhs

PROBLEM: kWTQrtCaoTbXIiXDphMG, pLhxkfeDoTbXIiXDpCCzTYyZv

SOLUTION: oTbXIiXDp

PROBLEM: gWMyioGBRpwcXfr, AOQGBRpwcSccqBE

SOLUTION:
GBRpwc