digraph P {
size="8,5"
node [shape=box];
0 -> 1 [ label="0.5" ];
0 -> 2 [ label="0.5" ];
1 -> 3 [ label="0.5" ];
1 -> 4 [ label="0.5" ];
2 -> 5 [ label="0.5" ];
2 -> 6 [ label="0.5" ];
3 -> 1 [ label="0.5" ];
3 -> 7 [ label="0.5" ];
4 -> 8 [ label="0.5" ];
4 -> 9 [ label="0.5" ];
5 -> 10 [ label="0.5" ];
5 -> 11 [ label="0.5" ];
6 -> 2 [ label="0.5" ];
6 -> 12 [ label="0.5" ];
7 -> 7 [ label="1" ];
8 -> 8 [ label="1" ];
9 -> 9 [ label="1" ];
10 -> 10 [ label="1" ];
11 -> 11 [ label="1" ];
12 -> 12 [ label="1" ];
}