-form eeeee efere effer efore efrem ekeko ekker ekmek ekrem emeer emere emerk emmer emore eofor eomer eorre erem- eremo erere erkko erome eroom eroor erore error feeme feeor feere fefor femme femoe feoff feorm ferme fermo ferr- ferre ferro fokke fomor foome foore fore- foreo form- forme forro freek freer freke freme fremm frere frome fromm froom frore k-mer keefe keere kefee kekem kemer kemme kerek kerem kerre ko-ko koker kokko kokor kokre korek korem korff korke korom koror korro kre-o kreef kreek kreke kreme kreo- kroke kromo meefe meere mefor meker mekko mekro memer memor meoke merer merke mero- meroe merom meroo meror merre mmmmm moeer moeme moere moerk moero moffe moffo moker mokke mokko mokre mokro momme momoe mooer mookk moore mooro moree morem morer mormo moror morre morro mrmom mroof mrorr o-fer oerme offek offer offof offre okeke okemo okere okker okome okoro omemo omero omore omoro oo-er oofem ooooo oreo- orere orero orfeo orfoe orfor orkom ormer oroer oroke orome oromo reefe reeme reemo reere refer reffe reffo refme rekem rekke remee remer remor reome rere- reree ro-ro roero roffe rofor rokee roker rokke rokkk romeo romer romfo romme rooer roofe rooke roome roore rorem rorer rorke