I bet you can use these Unicode symbols to pack 4 bits in one character — would look much nicer, too: Edit: HN cuts them away. But the idea is using these http

I bet you can use these Unicode symbols to pack 4 bits in one character — would look much nicer, too: Edit: HN cuts them away. But the idea is using these https://en.m.wikipedia.org/wiki/Box-drawing_character https://en.m.wikipedia.org/wiki/Box-drawing_character section Historical