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

Q: xMxyohPBlJIEBqghiMdBQPwq, xsBlJIEBqghlMosK

A: BlJIEBqgh
****
Q: lypuwWy, jRpuwcE

A: puw
****
Q: IhrjJEYabekZiQqoOD, oBPoREYabekZiQYlsHfThe

A:
EYabekZiQ
****