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在一次老同学的聚会中,当年的小调皮同学提出一个游戏让大家逗乐:把一对男女同学用如图1所示的的两条红绳分别套着各自的双
In an old school party, the little naughty student proposed a game to make people laugh: Put a pair of male and female students on each of the two red ropes shown in Figure 1.