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

VRamNL, mUamIB
am

spGRUmIYuGl, qkqRUmItqU
RUmI

qnbZhZrXUizjyjrHcLpGhWxO, FXYFYhYBhZrXUizjyjxWcKvrkOy

hZrXUizjyj