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public static void main(String[] args)          
{                                               
    Set<String> set = new HashSet<String>();    
    set.add("Stop");                            
    set.add("Look");                            
    set.add("Listen");                          
                                                
    Iterator<String> iterator = set.iterator(); 
                                                
    while (iterator.hasNext())                  
    {                                           
        String text = iterator.next();          
        System.out.println(text);               
    }                                           
}       

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