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:
UZbmGVDzIaf, qfHwqGVDzIsd
answer:
GVDzI


question:
DvnyYr, ognyvv
answer:

ny