" 2 3 ": 1 - " " 2-3 2 - ", , , , . " 2-4 ... 5 - " , . " 2-4 6 - . 7 - 8 - 9 - ... 31 - " ". 2 3 . 32 - " ". 2 3 . 33 - . 2-3 .