Did You Sleep

Did you sleep? This was the first time Pei Nan heard this sound after moving in. He felt that the roommate next door must be a chatterbox... Did you sleep? This is the second time Pei Nan has heard this sound since moving in, but there is no one next door... Did you sleep? This was the third time Pei Nan heard this sound after moving in. He decided to go and have a look... Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? Did you sleep? ! A? C￥#2? ? ? ? ;? = L l Concept: The complexity of human nature