l-pop l-ron lollo lolol lopon loron n-p-n nnooo no-no no-op nonno nonop noron norro ollon onoon onorn onpop ooooo oploo oppol oppon orlon orlop ornon orono p-n-p ploop plopp po-on po-po pollo polon polop ponor poopo poplr popon popop poppo porn- porno poro- poron porro proll prolo proor prop- propl propn propp propr ro-ro rollo rolon ronno rprop