9 . :2,5,7,12,5,6,8,9 1 ; ? ?:1,2,5,5,6,7,8,9,126 6 5 6 5 2) 11,13,15,11,17,12,18,7,16 7 , ? 10 !:

(12+13):2=12,5

????7 11 . 176 5 6 !