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

[Q]: cvRdSsuNwGVEwSSrowDpaOu, gFMcLKIeLwNwGVEwSSroUGskaoloqC
[A]: NwGVEwSSro


[Q]: iupYjFXrrMqWzJSLUSwmEukHc, hqajjWrrMqWzJSLnF
[A]: rrMqWzJSL


[Q]: IhksgT, VykslB
[A]:
ks