c-p-c ccccc ceene ceere cence cenpf cenpn cerc- cerce cerec ceren cerer cerne cerre cnnfn cnnnn cpcfc crece creen creep creer cren- crepe crnce crnec crner eccen eeeee eence eener eepee efere effer efren encre enfce enfer enper epeen epene eperc ereen erere ernen feere fence fener fenne ferce feren ferr- ferre frcpc freep freer frere n-p-n ncree necr- neece neere nefen nefer neffe nefre neper neppe neree nerre nnfcc p-n-p p-rep peece peene peere pence pene- pener penne penre pepee peppe perce perec peren perer perne perre prece preef preen preff prene prepn recce recen recep reece reefe reene reepe reere refen refer reffe refne rence renee rener renfe renne repec repen reppe rere- reree rnpep rperf