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

nOfXJySmVaJIindcJavXh, YpJWmVaJIindcJnoxyRvunG
mVaJIindcJ

faHRBWyXsYzYmHQyy, aHTyXsYzYeXBFV
yXsYzY

rxurnUdwhYOSR, uUlInUdwhJd

nUdwh