4 - easy.
1	4	4	NUM	CD	NumForm=Digit|NumType=Card	0	root	0:root	_
2	-	-	PUNCT	,	_	1	punct	1:punct	_
3	easy	easy	ADJ	JJ	Degree=Pos	1	parataxis	1:parataxis	SpaceAfter=No
4	.	.	PUNCT	.	_	1	punct	1:punct	_
