In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
--------
Question: jAinxmaQUrmu, jqeEnxmaQUrWlrEqW

Answer: nxmaQUr


Question: SIIPePlrkftKkzfgdjg, JqNnXHrkftKkzOMUwmc

Answer: rkftKkz


Question: VGgHPtLdTskKqsDEXeIVxeTJqMe, kMQrskKqsDEXecV

Answer:
skKqsDEXe