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

Answer: IhxJtWbn


Question: SUgXyznbUQRpiLUTlRb, jlnwLTnbUQRpioUFyJ

Answer: nbUQRpi


Question: shHTzxTnuAFZbsZQGd, QAmfAtTnuAFZHi

Answer:
TnuAFZ