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2.

3.
: (..) , - . : (..). , , . : .., ( ) . .. .
: . .., . , , 3- , . .
50 ( ). , .
1 (): .., *1 .., 1 . ., *, .. , .
2 (): .., * 1 . ( ), 2 . . ( ), *, .. .
3 (): .., 1 . ., 2 . . (+), *, .., .
4 (): .., *2 . . (+), 1 . ., *, .. .
5 (): .., 2 . ., 1 . , *, .. .
6 (): .., * 1 . , 2 . ., *, .. .
3 - 6 . 5- .
: 8 , 5 , ( ..). . .
5 (21, 37, 53, 69 16 ) : .., 3 ( 2 (2 . ., 1 . ), 4 . . ( - 1 ), . 4 . , 4 . . , 2 (2 . ., 1 . )), .. .
13 (29, 45, 61, 77 16 ) : .., 4 (2 . ., 1 . ), 2 ((2 . ., 1 . ), . 4 . . , . 4 . . ), 2 (2 . ., 1 . ), 4 (2 . ., 1 . )), .. .
5 16- 3 , 13- 16- - 2 .
5-20 26 . .