:
●5
●250-300
●3-4
●3
●1 ( )
●3+2
●
● -
4 ,
(, ),
.
,
, ,
, , ( ),
3
( 1 - )).
20
( , ).
( - ).
-
-.
! !
http://eda-ru.blogspot.com/2014/10/blog-post_20.html