CAVERNA

                                                                                 
                                                                                 
                                     `.--                                        
                             ``.-:/+ooooo:                                       
                      `.-::/+ooooooooooooo:                                      
                    ``:oooooooooooooooooooo-                                     
                    --.`:+oooooooooooooooooo-                                    
                   .----.`-+ooooooooooooooooo-                                   
                  `-------.`./oooooooooooooooo-                                  
                  .----------`./ooooooooooooooo-                                 
                 `------------.  ``````-/ooooooo-                                
                 -----------.`  `....``  `.:+oooo-                               
                :///:::::-.` ``..........``  .:+oo:`                             
              `/oooo++ooo/  `.....-oso+/-...``  /ooo+-`                          
             .++/-..-.-oo+  `....+yhhhhhhys/..  -oooooo/-`                       
            `..-`.ooo+`/oo` `...-hhhhhdddhhy-.` `ooooooooo/`                     
           :+oo/`+oooo:`oo-  ....hhhhmmmmmdh+.`  +ooooooooo:                     
          -ooo+`/oooooo`:o:  ....yhhdmmmmmmdy..  /oo+:-.-/o+                     
          +oo+`:ooooooo/`++  `...shhdmmmmmmmd/.  -:.-:+/-.`.`                    
         -ooo.-ooooooooo.-o  `...shhdmmmmmmdo-`  ./oooo+----.                    
         +oo..oooo+/oooo+`+. `...ohhdmmmmdo-`  `/oooooo+-----`                   
        -oo+ +o+:.`.ooooo-.-  ...+hhdmmms-`  ./ooooooooo.----.                   
        +oo/ :.`.-.`ooooo+`-  .../hhmmmd/` `/ooooooooooo------                   
       -ooo/ .-----`oooooo:`  `../hhmmmd-  .oooooooooooo/.----`                  
      `+ooo:`------.:////++`  `..:hhmmmh.  :oooooooo+/oo/`----.                  
      -oooo:.---------------` `..-hhmmmy.  /oooooooo:`+.`------`                 
      +oooo-----------------`  ..-yhmmmo`  +oooooooo/ `.-------`                 
     -ooo+/-----------------.  ...yhmmm+` `ooooooooo+ ---------.                 
    `++/---------------------` `..syddh/  -oooooooooo`.---------`                
     ````````````````````````  `````````   `````````` ``````````
Mathematicians are like Frenchmen: whatever you say to them they
translate into their own language and forthwith it is something
entirely different.
-- Goethe