If you want to be sure, it is best to do both.
1	If	if	SCONJ	IN	_	3	mark	3:mark	_
2	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	3	nsubj	3:nsubj|6:nsubj:xsubj	_
3	want	want	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	10	advcl	10:advcl:if	_
4	to	to	PART	TO	_	6	mark	6:mark	_
5	be	be	AUX	VB	VerbForm=Inf	6	cop	6:cop	_
6	sure	sure	ADJ	JJ	Degree=Pos	3	xcomp	3:xcomp	SpaceAfter=No
7	,	,	PUNCT	,	_	10	punct	10:punct	_
8	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	10	expl	10:expl	_
9	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	10	cop	10:cop	_
10	best	good	ADJ	JJS	Degree=Sup	0	root	0:root	_
11	to	to	PART	TO	_	12	mark	12:mark	_
12	do	do	VERB	VB	VerbForm=Inf	10	csubj	10:csubj	_
13	both	both	DET	DT	_	12	obj	12:obj	SpaceAfter=No
14	.	.	PUNCT	.	_	10	punct	10:punct	_
