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

SOLUTION: qra

PROBLEM: XZslQqrShfCXRXyHrFVq, BtOQgQqrShfCXRRCRbMvXPM

SOLUTION: QqrShfCXR

PROBLEM: hsRcSlVW, ZmRcSlPY

SOLUTION:
RcSl