What are the possible genotypes of the parents for Cystic Fibrosis?

The parents of a child with CF must both have CF or one has it one doesn't or both be carriers or one has it and the other is a carrier. (See example of genotypes below)
The genotypes would be the following:
C=CF
c=normal
--- =mating with
CC --- CC
CC --- Cc
Cc --- Cc
Cc --- cc