instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
uDaqoOpUtLDdTGTO, ncIgBjDPqoOpUtLDdTNtiEyarDO
answer:
qoOpUtLDdT


question:
yjoJzBGdwfOhsceoOpoap, uSLMdBGdwfOhsIQHBijd
answer:
BGdwfOhs


question:
kZmclKDglvAxkwB, QkObiKDglvASHxEJ
answer:

KDglvA