Obligatory Options {You Must Choose At Least One}

Curly Braces and Vertical Bars: Choose one and only one option.

{die_on_your_feet | live_on_your_knees | live_on_your_feet}

Curly Braces and Commas: Choose one or more options. If you choose more than one, separate your choices with commas.
```
{cash, check, credit}
```