nodes.txt

7 0
5 0
11 0
6 0
17 0
12 1
13 1
1 1
18 1
22 1
8 1
4 1
2 1
20 1
14 1
3 2
32 2
10 2
29 2
28 2
26 2
25 2
9 3
31 3
34 3
33 3
21 3
24 3
15 3
16 3
23 3
19 3
30 3
27 3