When you read this article, take a paper on a paper. In "Harry Potter and the Philosopher's Stone", there is a verse of the people I want to have a deep impression. On the way to the rescue magic stone, Harry Potter and Hermion were stopped by Snape's drugs: Seven different bottles were discharged on a table, and there was a piece of paper on the table. : Danger lies before you, while safety lies behind, Two of us will help you, whichever you would find, One among us seven will let you move ahead, Another will transport the drinker back instead, Two among our number hold only nettle wine, Three of us are killers, waiting hidden in line Choose, unless you wish to stay here for evermore, to help you in your choice, we give you these clues four:. First, however slyly the poison tries to hide, you will always find some on nettle wine's left side; Second, different are those who stand at eigher end, But if you would move onwards, neither is your friend; Third, as you see clearly, all are different size, neither dwarf nor giant holds death in their INSIDES; FOURTH, THE Second LEFT AND THE Second On The Right Are Twins Once You Taste The Right Are THOUGH DIFFERENT AT First Sight. Miss Hermione is really smart, she read this paper, only spent a minute, Just cracking a mystery of mystery - the minimum bottle is to let people go forward, and the far right The bottle of the side is to make people returning. But the lady helpless Rowling refused to reveal the location of the seven bottles (maybe she thought that the reader will jump directly, I don't know if I have this BT), I have a good depression. When no one tells you the seven bottles of the arrangement, what should you go down? To organize this passage and Miss Hemin, you will find that there will be the following six points to affirm the information: * In this seven bottle of medicine, a bottle can make people go forward, a bottle can make people look back, there are three bottles of There is no effect of liquor, there are two bottles of poison; * Put it in the left and right, you can't move forward; * The largest bottle and the minimum bottle are not poison; * The second bottle and the right side of the left side of the left The same liquid is installed; * The minimum bottle is to make the potion that is moving forward; * let people look back at the right side.