	G	2
	z

.	
	p	[
z			
		
		R				(		f	=		p						p	?
	f	
		p			b		e		[	Gz	Gp	z	2	p	"	z	2|	[	(	p	G2	z	(	z	2		B	2	e		[			z		e									f				p		[						p						(		G	e	2	z	Q	Q	e	[	p	(	2z	e	e	e		~		}	G		[															G(
Q		(G
[		G2
	G	p
z(G 
0
[[A
p		Q
[
2
_
[
	h
<
	k
=(
Q	i
z	
2	b
	
(	W
	I
	
	:
		+
	
(	
2	
Q	
z		p												p	(	e	<	p	G	Q
2	p
<	e$
	;
	V
	zq
	p
	
	
	
z	
[	
f	
=	
p	
f	t
z	Y
[	>
p	#
z	

				2	z	<	p						<		e	[	<	e							Q									Z			