http://3.bp.blogspot.com/-rUScSOR4NkQ/UML5eNavzYI/AAAAAAABXCo/...
? - . 4. - 3 ...
"" : - 200 . - 250 . ...
! ...
: : 2 ...
"//": 1 - ! 2 - , ... 28 - 29 - , 30 - 31 - " " 32 - ""... 39 - 40 - + 41 - )))