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

MSzHyOuaJILkeY, eUibEHoHyOuaJIhfvXy
HyOuaJI

cxYVucnmEQopeWHrPJ, jNnOaYVucnmEQoSE
YVucnmEQo

oKZCAErEMqzODnkcNqxVdoBOC, yHzRJuSqzODnkcNqxExr

qzODnkcNqx