***This is strong and em.***
So is ***this*** word.
___This is strong and em.___
So is ___this___ word.
(Remember that `*` and `_` do not work in the middle of words in MultiMarkdown - too much accidental stuff with URL's)
*\*This is em with surrounding asterisks.\**
Rigorous test of combined strong and em:
The sun is **_yellow and bright_**.
The sky is __*blue and clear*__.
The moon is *__full and gray__*.
The stars are _**Bright and sparkly**_.