a lesson

_       ___        ______  _____     ___    _     ___
)  ____) (__    __)    /  \    |    \  |  | |    \ 
(  (___      |  |      /    \   |  |\ \ |  | |     |
\___  \     |  |     /  ()  \  |  | \ \|  | |     |
____)  )    |  |    |   __   | |  |  \    | |     |
(      (_____|  |____|  (__)  |_|  |___\   |_|    /__
_       ___        ___      __     ____     _________
)  ____) (__    __) (_    _) \   |    \   |        
(  (___      |  |      |  |    |  |     |  |        
\___  \     |  |      |  |    |  |     |  |     __ 
____)  )    |  |     _|  |_   |  |__   |  |__  (  )
(      (_____|  |____(      )_/      )_/      )_( /__
____  _____     ___    _     _______      __
  /  \    |    \  |  | |    \     (_    _)
 /    \   |  |\ \ |  | |     |      |  |  
/  ()  \  |  | \ \|  | |     |      |  |  
|   __   | |  |  \    | |     |     _|  |_ 
|  (__)  |_|  |___\   |_|    /_____(      )_
   ____    __      __     ____     ____
|  |    |  | (_    _) \   |    \   |   
|  |    |  |   |  |    |  |     |  |   
|  |    |  |   |  |    |  |     |  |   
\  \/\/  /   _|  |_   |  |__   |  |__ 
__\      /___(      )_/      )_/      )_
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|    \  \    ___)    /  \    |    \     (__    __)   )   (  
|     )  |  (__     /    \   |     |       |  |     /     \ 
|    /   |   __)   /  ()  \  |     |       |  |    (       )
| |\ \   |  (___  |   __   | |     |       |  |     \     / 
| |_\ \_/       )_|  (__)  |_|    /________|  |______)   (___
_        __    ___    _        __        __
(__    __) \  |   |  / \    ___) \    ___)
  |  |     |  \_/  |   |  (__    |  (__  
  |  |     |   _   |   |   __)   |   __) 
  |  |     |  / \  |   |  (___   |  (___ 
___|  |____/  |___|  \_/       )_/       )_

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