//  
//*************************************** 
 ()
	 = ..;
 //
//**************************************
 ()
//	(1);
	 = .(());
	  = 1  .() 
		 = .();
		 = .;
		.(,);
	;

//**************************************
 ()
	 .()=1 
		  = 1  .() 
			(""+,.());
		;
		 ((2) <> "") 
		 (2.() = "") 
			2.(1);            			
		;
		 ((3) <> "") 
		 (3.() = "") 
			3.(1);            			
		; ((4) <> "") 
		 (4.() = "") 
			4.(1);            			
		;
	;	


//**************************************
 ()
	=("");
	();

//*************************************** 
 ()
	("",);

//*************************************** 
 ()
	 ((2) <> "")  ((3) <> "")
		 ((4) <> "") 
	 (2.() = "")  (3.() = "")
         (4.() = "") 
		.(1);	    	
		 .() <>1  
			 = .;
		;
	;

//*************************************** 
 2()
	 ((2) <> "") 
	 (2.() = "") 
		2.(1);	    	
		 2.() <>1  
			2 = 2.;
		;
	;

//*************************************** 
 3()
	 ((3) <> "") 
	 (3.() = "") 
		3.(1);	    	
		 3.() <>1  
			3 = 3.;
		;
	;

//*************************************** 
 4()
	 ((4) <> "") 
	 (4.() = "") 
		4.(1);	    	
		 4.() <>1  
			4 = 4.;
		;
	;

//*************************************** 

 ()
	 (.()=0)  (()=0) 
	    ;
	;
	(1);
	 = .(.());
	 = ();
	..();
	//(());
	// ()="" 
	//	.(1);	    
	//;
	 ((2) <> "")  ((3) <> "")
		 ((4) <> "") 
	 (2.() = "")  (3.() = "")
	     (4.() = "") 
		.(1);	    	
		 .() <>1  
			 = .;
		;
	;


//**************************************
 ()
();
 = .(.());
 ()=1 
    (,);
;

//**************************************
//**************************************
//**************************************
//**************************************
