CRETE
If 2, then _ _ E _ E is proven because CRYPT=0 so It can't be from the CR. other than that, only letter change from CREME Is M --->T.
If 3, than _ _ E T E is proven because none can be from the CR.
If 4, what the heck? that's impossible!
If 1, then _ _ _ M _ is proven because CREME ---> CRETE only changes the T/M. T ----> M dropped a hit.