c-p-c ccccc ccell ccrcl ccrel ceele ceene ceere celer cell- celle cence cenel cenpl cenpn cerc- cerce cerec ceren cerer cerne cerre cleen cleer clene clepe clerc clere cnnnn crece creel creen creep creer crele crell cren- crepe crnce crnec crner crrel eccen eccle eeeee eeler eence eener eepee elele elene ellel ellen eller elnec elpee elper elrec elren encre enlen enper epeen epene eperc ereen erere erlen ernen ernle erpel lcecn lecce leece leell leere lelep lelle lence lenne lepel leper leppe lepre leren lerer lerne n-p-n ncell ncree necr- neece neele neere nelle neper neple neppe neree nerre p-n-p p-rep pcell pecel peece peele peell peene peere peerl pelee peler pelle pence pene- pener penne penre pepee pepel peple peppe perce perec perel peren perer perle perne perre pleen pleep plene prece preen prell prelp prene prepl prepn recce recen recep reece reene reepe reere relee rence renee rener renne repec repel repen reple reppe rere- reree rnpep