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

euQWhCovKplukMYznXcD, XAfMhKdzhCovKplukMcMlSuBw
hCovKplukM

SUueHhzGsanfsalEEc, KygEhzGsanfsapbKKX
hzGsanfsa

lCIEemiyaYdGRSycg, NdLCFqvEemiyaYdGXnFHLo

EemiyaYdG