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

Q: eedZoMwKgDhdsgs, kMMwKgDLm

A: MwKgD
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Q: QRPOwtZATjDoJDdRNNSOH, wiafFMwpAjDoJDdRNNuCDZ

A: jDoJDdRNN
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Q: cfvqbAUpWEmhCSFaUvGrYVNGeUiRP, hAxWMEmhCSFaUvGLBLmdTxhy

A:
EmhCSFaUvG
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