e-one eeeee eepee eevee enevo enone enope enpo envex epeen epene epone even- evene eveno eveve exene exxon n-p-n neeve nenno neoev neope neppe neven nevve nexen nexoe nexon nnooo no-no no-op nonne nonno nonop noone nopep noppe novex novo- noxon oeno- oenoe oeppo one-x onene oneno oneon oneop onne- onnen onone onoon onpop onxeo ooooo oovoo openx opepe opone opovo oppon p-n-p p-o-x peene peeve pene- penev penex penne penon penov peone pepee pepon peppe pevno pneo- po-on po-po ponne poope poopo poove popex popon popop popov poppe poppo povvo poxon pppox v-one v-pop veeno veeve venee venev venne veno- venoe venon vepen veveo voxeo x-one xeno- xenon xepon xexex xonox xoxox