CheckBracketsCorrectlyNested

- Assume most recent language standard are available (ES5, SE8, C11, C++11...).
- We expect good performance.
- If missing more requirements details, just make reasonable assumptions of
  your own.
- Solution must be simple and compact.
  No defensive coding, no comments, no unrequested features.
  Only one file 10-20 lines of code
- Work only inside Google Docs: no external editor/IDE/debugger, no copy-paste
  to/from such an editor. We must see the flow of how you write the code.

Implement function check (text) which checks whether brackets within text are
correctly nested. You need to consider brackets of three kinds: (), [], {}.
Examples:
    
check("a(b)") -> true
check("[{}]") -> true
check("[(]") -> false
check("}{") -> false
check("z([{}-()]{a})") -> true
check("") -> true

Click F12 And F5 and debug to see results!