instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
cvRdSsuNwGVEwSSrowDpaOu, gFMcLKIeLwNwGVEwSSroUGskaoloqC
answer:
NwGVEwSSro


question:
ljwjMioOwfOltGBaE, TneNGsoOwfOlxnWWW
answer:
oOwfOl


question:
trPddmIDDUPLajdwqOSSt, pUVmVXiddmIDDUPLblNGefI
answer:

ddmIDDUPL