=== Aude Help ===
Made by Sven Nilsen, 2022

Aude is based on paper "The Simple Essence of Automatic Differentiation"
http://conal.net/papers/essence-of-ad/essence-of-ad-icfp.pdf

Special commands:
- bye            quits the program
- echo <expr>    prints out debug format of expression
- ``             prints separator for readability