Adding an exercise.

CONTRIBUTING.md

@@ -100,16 +100,32 @@ If the idea doesn't fit in one of those discussions, then if it relates to:
 
 ### ... improving the command-line client (CLI) 
 
-- Does this idea fold in to the existing discussion around the CLI?
-  * [`exercism/discussions#35`](https://github.com/exercism/discussions/issues/35) — "User Experience -- redesign/rethink the command line interface";
-  - [`exercism/cli`](https://github.com/exercism/cli/issues?utf8=%E2%9C%93&q=is%3Aissue%20is%3Aopen).
-- if the idea isn't being discussed yet, kick it off in the [`exercism/cli`](https://github.com/exercism/cli/issues/new) repository.
+Current specific discussions:
+
+* Overall user experience with the CLI: [`exercism/discussions#35`](https://github.com/exercism/discussions/issues/35).
+
+Here are some helpful starter searches in the two repositories that contain ideas about the CLI:
+
+* [`exercism/cli?`](https://github.com/exercism/cli/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc)
+- [`exercism/discussions?cli`](https://github.com/exercism/discussions/issues?q=is%3Aissue+is%3Aopen+cli+sort%3Aupdated-desc)
+
+If the idea isn't being discussed yet, kick it off in the [`exercism/cli`](https://github.com/exercism/cli/issues/new) repository.
 
 -
 
 ### ... a brand-new exercise for Exercism 
 
-- 
+A big part of what Exercism valuable/fun is a rich set of exercises (it's in the name!) :)  Thank you for thinking of adding to this.
+
+*Note: the central library of exercises on Exercism is https://github.com/exercism/x-common.*
+
+- Check to see if the exercise is listed: https://github.com/exercism/x-common/tree/master/exercises.
+  - If it is there, but not in the language you'd like to solve it in, put in a request in that particular language's repository: http://exercism.io/repositories.
+    - After making the suggestion, if you have the time and the desire, you can help *even more* by [implementing it](#-fluency-in-a-particular-programming-language).
+  - If it is not there, suggest it in [`exercism/x-common`](https://github.com/exercism/x-common/issues/new).
+    - After making the suggestion, if you have the time and the desire, you can help *even more* by [implementing it](https://github.com/exercism/x-common/blob/master/CONTRIBUTING.md#implementing-a-completely-new-exercise).
+- If you know of a good source of potential new problems, please share: [`exercism/x-common#107`](https://github.com/exercism/x-common/issues/107).
+
 
 -