              .

           :

-------------------------------------
| ..............         |
| .........         |
|.......................         |
|.................         |
| ..................         |
|...................         |
| ................         |
| ............         |
|  ..         |
| .........         |
-------------------------------------

F1  F2/+  F10 

             
      ,  ,
 ,   .     ,
   .
             .
         
       .  
          
   ,    
      .  
         
       . 
     .
	   " "  " ", 
  ,      
        .
	   " ",  
        
   .
         "  "  " "
   ,    
   .      
    1  0.
             , 
 ,     ,   
         
.         
     F2.
