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# [Lua 5.4](https://www.lua.org/versions.html#5.4), 3 unique characters

``` lua
#'#'/#'##'
```

[Try it online!](https://tio.run/##yylN/P9fWV1ZXR9IKKv/LyjKzCvRQAho/gcA)

> _[...]_ scoring is done in terms of number of **unique characters** used in the submission.

1. Hashtag **#**
2. Single quote **'**
3. Slash **/**