, , ( ) , , , , , . . 2- . ( 2- ). (3 ) . .( ) 1. 2. ( 2 + 2 ) 3. 4. 1. 2. 3. 4. - , . , , 10*10 , 10*14 . , 8-, 12- ( . ( )
" ": 1 - 2 - ... 24 - . 25 - - 26 - 27 - 28 - . .... 40 - . . 41 - 56 42 - - c