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5 ІІІ І
,
-
a, b, c
. .
 

r n . n 1,2,,n r . ; ( ) ( (rn)).

r n w = (i1,i2,,ir), ij , j. [i1,i2,,ir], ij , j- . :

( ) ( )

( ) ( )

,

( ) ( )

( ) ( )

r n :

1) ,

|W| = nr

2) , (rn)

|W| =

3) , (rn)

|W| =

4) ,

|W| =

|W| r n

nr

-

|W| r n

, , -, - (, -), - (, , ).

.