>Caoo oaee ec a 20 y! ...
! ...
"", , ...
...
, ...
48 ( )-1/2 ( 1/ 4 1/4 ) -2 -2 -1 -1 -1 -1 1/2 , 12 4 ( ), , , ( ) - "" . 180 8-15 , .
! !! !! -.