TASK DEFINITION: In this task, you are given two strings A, B. Find the longest common substring in the strings A and B.
PROBLEM: ZyrpGdXvvtrKQIxU, CLNGdXvvtrKQDpicfqLdt

SOLUTION: GdXvvtrKQ

PROBLEM: GFhJafTV, waHhJaji

SOLUTION: hJa

PROBLEM: BWdpoKAUzlYfA, ipVTCPoKAUzliYnl

SOLUTION:
oKAUzl