title: Split string to a list of strings in Clean
body: <p>Because of the limited amount of resources, I need to propose a question <em>here</em>. I have been struggling with functional programming, the endless Haskell tutorials don't really help me. So what I want to achieve, in Clean language, is to split a string like <code>"  car  cow cat    "</code> to a list of strings <code>["car","cow","cat"]</code>. Can you provide me a detailed answer (does not have to be complete code), on how to iterate through this string, and especially the part when the newly constructed strings are added to the list? </p>