:
21 . + 2 . , . .
. . .
= 10 . .
1 . , 1 .
1- 24- .
http://shemyuzorov.com/page/uzor-iz-kos-1#cut
"": 1 - - + 2 2 - 3 - 12 4 - "" 5 -
" ": 1 - "" 2 - ... 6 - 7 - 8 - "" 9 -