instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
ohueEOjHvAuoFVmMFft, ovdJPqOjHvAuoFVGbvxzlnE
answer:
OjHvAuoFV


question:
EOacPYivmmUlYenynBqAwx, MoZWMOeXmUlYenynBEendWg
answer:
mUlYenynB


question:
FxJvrzumXDWrhrToKB, dWorzumXDWrhqbzI
answer:

rzumXDWrh