e-one eeeee eepee enone enope enpo enzen epeen epene epone n-p-n neez neeze nenno neope neppe nnooo no-no no-op nonne nonno nonop noone nooze nopep noppe nozno nozze oeno- oenoe oeppo onene oneno oneon oneop onne- onnen onone onoon onpop ooooo opepe opone oppon ozen- oznoz ozon- ozone ozono p-n-p peene pene- penne penon peone pepee pepon peppe pneo- po-on po-po ponne ponzo poope poopo popon popop poppe poppo pozzo pzone zenne zeno- zenpo zenzo zeppo zonne zono- zoppo zzzzz