Please consider using Tsitu's MapSolver - this one is no longer actively maintained.
Copy and paste mice from maps or type mice names leaving a line break between each
Press Enter to autocomplete, and Tab to cycle through suggestions
News – Oct 2018: I noticed that the bookmarklet doesn't work anymore and would need to be changed. As I didn't maintain the solver a lot during the last months, I strongly suggest to use Tsitu's excellent alternative. It offers much more options than this one and is actively maintained.