$ perl huffman.pl
Total occurrences: 697
Animal: walrus, depth 5 * occurrences 15 ==> 75
Animal: badger, depth 5 * occurrences 17 ==> 85
Animal: seal, depth 5 * occurrences 18 ==> 90
Animal: pegasus, depth 8 * occurrences 1 ==> 8
Animal: axolotl, depth 9 * occurrences 1 ==> 9
Animal: unicorn, depth 9 * occurrences 1 ==> 9
Animal: hamster, depth 7 * occurrences 5 ==> 35
Animal: ocelot, depth 7 * occurrences 5 ==> 35
Animal: gerbil, depth 8 * occurrences 3 ==> 24
Animal: platypus, depth 8 * occurrences 3 ==> 24
Animal: cow, depth 3 * occurrences 75 ==> 225
Animal: fish, depth 2 * occurrences 150 ==> 300
Animal: dog, depth 3 * occurrences 85 ==> 255
Animal: cat, depth 3 * occurrences 91 ==> 273
Animal: wolverine, depth 5 * occurrences 22 ==> 110
Animal: frog, depth 5 * occurrences 28 ==> 140
Animal: wolf, depth 4 * occurrences 55 ==> 220
Animal: sheep, depth 4 * occurrences 60 ==> 240
Animal: horse, depth 4 * occurrences 62 ==> 248
Avg: 3.45050215208034