In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
--------
Question: TTagIJmzrOTdnKr, UONmtdHJmzrOTduWo

Answer: JmzrOTd


Question: YXsgPE, ENsgSO

Answer: sg


Question: zIhaSKGFL, dWMjaSKGeE

Answer:
aSKG