We're busting out this classic brain teaser to test your smarts, which of these coffee cups will fill up first?

520487

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460010

{"replyTo":"

613079 发表于 2019-02-13 10:59:12 Should be 4

","text":"9","replyToPid":3275}

522845

{"replyTo":"","text":"Its 5. All the other lines are blocked. Look closer.","replyToPid":0}

613079

{"replyTo":"","text":"Should be 4","replyToPid":0}