### What? Write a program that prints only unique letters in a string ### Why? The [existing solutions](https://stackoverflow.com/questions/32132491/how-can-i-find-unique-characters-per-line-of-input) are awful. Also, how can we make that as fast as possible? ### How? Be creative.
What?
Write a program that prints only unique letters in a string
Why?
The existing solutions are awful. Also, how can we make that as fast as possible?
How?
Be creative.