It is the beginning of the school year, and Kyoto Senior High School has gathered four classes ABC and D. Each class has its own genius. Nearly 40 students from Class D (Class 1) will compete with the other three classes. Of course, the overall strength of these four classes is different, which is related to their letters. If they want to find a way to advance from Class D to Class A, can they be promoted? If possible, who will lead them to break through the encirclement and be promoted to Class A?
Purpose: solving puzzles