In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

kWTQrtCaoTbXIiXDphMG, pLhxkfeDoTbXIiXDpCCzTYyZv
oTbXIiXDp

RinootTGLjbRGYznmBdH, oRMtTGLjbRGYzwEVHsjW
tTGLjbRGYz

uHLEdBOf, UOQLEdOg

LEd