Describir: Expression propre :

 _    _      ___     _____      ______               ___              
| \  / ||   / _ \\  |  __ \\   /_   _//   ____      / _ \\    ____    
|  \/  ||  | / \ || | |  \ ||   -| ||-   |    \\   | / \ ||  |    \\  
| .  . ||  | \_/ || | |__/ ||   _| ||_   | [] ||   | \_/ ||  | [] ||  
|_|\/|_||   \___//  |_____//   /_____//  |  __//    \___//   |  __//  
`-`  `-`    `---`    -----`    `-----`   |_|`-`     `---`    |_|`-`   
                                         `-`                 `-`      
 _    _   
| || | || 
| || | || 
| \\_/ || 
 \____//  
  `---`