It's called a prefix code. It's a fundamental idea in coding theory. https://en.wikipedia.org/wiki/Prefix_code https://en.wikipedia.org/wiki/Prefix_code https

It's called a prefix code. It's a fundamental idea in coding theory. https://en.wikipedia.org/wiki/Prefix_code https://en.wikipedia.org/wiki/Prefix_code https://en.wikipedia.org/wiki/Coding_theory https://en.wikipedia.org/wiki/Coding_theory