1.

5.........7..........6

2.

5.......4.......3

3.

6........7..........5

4.

8..........3..........6

5.

4.......7.......9

6.

4...........7...........8.

7.

8..........5.........7

8.

5........13...........10

9.

11.........7.........4

10.

7..........2........11.

11.

9...........5...........4

12.

5............6..........7