,
1
...
9
10
11
12
13
14
15
16
17
18
19
20
21
...
31
13.
() N 17.
500
.
21
.
8.
190. , , : ) M (X Y) = M (X) M (Y); ) X M (X)
1. ,
501
: , , ,
, ,
,
1
...
9
10
11
12
13
14
15
16
17
18
19
20
21
...
31