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

[Q]: EeUODjkxsQeTSNsHYpBKIUvEuAKhB, SrpZeTSNsHYpBKdhPFlgMh
[A]: eTSNsHYpBK


[Q]: BmxgSFWBlVX, kGgKrgSFWBlGunFcZ
[A]: gSFWBl


[Q]: tmBlKUto, eFDBlKLy
[A]:
BlK