Smart Solution to Avoid Collision

There are two sections A and B in a college. Dr. Sahu is teaching in section B and Dr. Bharadwaj in section A. Today Dr. Bharadwaj announces that he is going to leave the college. Next day it turns out that Dr. Sahu is going to teach both the sections, so he wants both sections to have the same experiments and in the same order in everyone’s notebook for his convenience, so he asks the CR to find