How do you spell costatoshin?

The word "costatoshin" is not a recognized English word. It's possible it's a:

* Misspelling: There might be a typo in the word. Do you mean a different word?

* Proper noun: It could be a name or place name. Without more context, it's impossible to know the correct spelling.

* Made-up word: It could be a fictional term or slang.

Please provide more context or clarify the intended meaning to help with spelling it correctly.