Traceability of the Rubik's Cube

Demon Lord: We are actually living in the underworld. So many stars cannot warm this universe. The universe is dark, cold, and lonely. Lin Tian: It really fits the characteristics of the underworld. It seems that I am a person from the underworld. Demon Lord: There is only the loss of energy in the universe, but no energy generation, which does not comply with the law of energy conservation. Lin Tian: Where to start? Demon Lord: All the energy on the earth comes from the sun, and the energy of the sun is produced out of thin air. All stars are also produced out of thin air. They shine, heat and consume energy as soon as they appear. Lin Tian: So what? Demon Lord: So there is a Yang Realm that can generate energy out of thin air. This Yang Realm exists in what we call the dark universe...