# Example octree. Each line has the following form:
# <x> <y> <z> <level> <leaf node?> <payload.val><payload.tag>

# Parent node
0 0 0 29  0 0 A

# Children of node [0,0,0,29]
0 0 0 30  1 1 B 
2 0 0 30  1 2 B
0 2 0 30  0 3 B
2 2 0 30  1 12 B
0 0 2 30  1 13 B
2 0 2 30  1 14 B
0 2 2 30  1 15 B
2 2 2 30  1 16 B

# Children of node [0,2,0,30]
0 2 0 31  1 4 C
1 2 0 31  1 5 C
0 3 0 31  1 6 C
1 3 0 31  1 7 C
0 2 1 31  1 8 C
1 2 1 31  1 9 C
0 3 1 31  1 10 C
1 3 1 31  1 11 C