-  "N" ()
- "N" () "P" ()

      -  "D" (1-
- "D" (1- )

      -  "D" (2-
- "D" (2- )

      -  "D" (3-
- "D" (3- )

      -  "D" (4-
- "D" (4- )

      -  "R" (
- "R" ( )


      1. . 2. . , ...

      ( )
      (ON) , (ON), ...

      5 10
      ( ) 1. 2. 3. 4. 5. . ...