c-p-c ccccc ceene ceere cence cenpn cerc- cerce cerec ceren cerer cerne cerre cnnnn crece creen creep creer cren- crepe crnce crnec crner eccen eeeee eence eener eepee encre enper enzen epeen epene eperc ereen erere ernen erzen n-p-n ncree necr- neece neere neez neeze neper neppe neree nerre nezer nzcer p-n-p p-rep peece peene peere pence pene- pener penne penre pepee peppe perce perec peren perer perez perne perre prece preen preez prene prepn preze recce recen recep reece reene reepe reere reeze rence renee rener renne repec repen reppe rere- reree rerez rezen rnpep zener zenne zepce zeren zerre zzzzz