This time Death-Moon do not told a profound story, but told a love story. Long time ago there were two lovers A and B in different place, and it was not convenient to see each other, so they frequently sent messages to each other. One sent ten messages a time, then received some feedbacks, if half or more feedbacks received, one would felt happy because message sent successfully, but if received less feedbacks, one would felt sad.
2 A 5 5 B 6 4 3 A 0 10 B 0 10 A 10 0
Happy Happy Happy Sad