                   
                      .

	       
   ,     
     .  ,
      ,  
        
.
	        :

-----------------------------------
| ...(.)..         |
| ....(.)..         |
| .(,,)..         |
-----------------------------------

F1  F2/+  F3  F10 

	     
  .   " "  , 
     .   "
"  ,      
.
