instruction:
In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
question:
ilgSzrcUKLTNLJbMKMKSt, hFXIuUKLTNLJbMKWxSCkDjY
answer:
UKLTNLJbMK


question:
biAihydBoNlzR, IAloNhydBolwUz
answer:
hydBo


question:
sJiofReEMlGd, oLWfReEkFx
answer:

fReE