...
(-2) , ...
( ) () ...
- - ...
7+4. 90, .
1*1 , "". ( . : Cross 4L (4 ): "" , 3 , 1 ""; Cross 4R (4 ): 3 "" , 1 , "". "" . 1 : ( ) ; 2 : ; 3 : Cross 4L, 1 , Cross; 4 : ; 1- 4- .