In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.

[Q]: ohueEOjHvAuoFVmMFft, ovdJPqOjHvAuoFVGbvxzlnE
[A]: OjHvAuoFV


[Q]: XbjDHRCWxdPbhibUKn, SrpuPDHRCWxdPbKPWEXNWbZ
[A]: DHRCWxdPb


[Q]: lTupMuLYtSgecioKDzuoQ, AeqKoLYtSgeciPIu
[A]:
LYtSgeci