csfieldguide/static/img/chapters/huffman-tree-dna-building-2.txt
Dot notation for image, created with viz-js.com
digraph G {
graph [ranksep=0,bgcolor=transparent];
node [shape=Mrecord];
a [label="{2|a}"];
g [label="{1|g}"];
c [label="{3|c}"];
3 -> a [label=0];
3 -> g [label=1];
6 -> 3 [label=1];
6 -> c [label=0];
}