11 4 9
X X 10
X 12 5

24 X X
X X 23
20 25 X

X X 11
12 X 4
5 10 9

X 1 X
X X X
X X X

13 20 15
18 16 14
17 12 19
         
13 X 15
X X X
17 X 19

X X X
X X X
X X X