Thinking Step 2: 推理第一个人。如果他不想要，他会直接说“不”（因为只要有一个不要，全称命题为假）。他说“不知道”，说明他自己想要，但他不确定后面两个人想不想要。
S = requests.Session()
，详情可参考同城约会
"You just feel like you're the most free person in the world. You've got this tight knit group of people, and you all really care about each other - you become like a little family. Everyone looks after each other."
专为函数调用而生 — 并非通用聊天工具
return originalPlay.apply(this, arguments);