e-one eeeee eepee enone enope enpo eofen epeen epene epone fenne fenno fenoe feoff fonne foone n-p-n nefen neffe nenno neofe neope neppe nnooo no-no no-op nofee nonne nonno nonop noone nopep noppe oeno- oenoe oeppo offen offof offon ofone ofono ofpop onene oneno oneof oneon oneop onne- onnen onoff onone onoon onpop ooooo openf opepe opone oppon p-n-p peene pene- penne penon peone pepee pepon peppe pneo- po-on po-po ponne poope poopo popon popop poppe poppo