"The sky is above the earth."
Translation:La ĉielo estas super la tero.
If nothing helps, type cx for ĉ. Better than just c. The X-method is not fundamental as ch is, but has the advantage that you may convert cx <-> ĉ back and forth as often as you want. So long you are not dealing with bilingual texts with french names like Bordeaux and operating systems like Linŭ :P .