Thinking Step 4: 推理第三个人。他听到了前两个人的话，推断出前两个人都想要。加上他自己也想要，所以三个条件都满足。
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backpressure: 'strict' // or 'block', 'drop-oldest', 'drop-newest'
Volatility and unusual structure at Stamford Bridge leave club’s young manager with a big test to rebuild like his rival has at Arsenal