instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
rRmkmETbjzCzZZxihrVdefxfcenJ, ogQtzAgWjKCzZZxihrVdRswMCmngp
answer:
CzZZxihrVd


question:
lPhVhAQZWJDrvzcEaGEwKgZAuJI, qIJDrvzcEaGDRCRrB
answer:
JDrvzcEaG


question:
kAelcj, ZCeloO
answer:

el