a-ak a-ok aaaa aaaf aaar aafa aaff aaka aaoo aara aaro afaa afak afao afar affa affo afka afkr afoa afoo afor afr- afra afro akaa akao akar akka akko akok akr- akra aora araf arak arar arfa arff arka arko aroa aroo aror arr- arra arrk arro arrr f--k faaa fafa faff fafo fako fara fark faro farr ffar ffff ffrr foaf foak foar fofo foof fook for- fora fork foro forr frak kaaa kaaf kaak kaar kafa kaff kafr kaka kakk kako kaoa kaok kaor kara karf kark karo karr kfar kffa kfff kffk kfka kfok kfoo kfor kfra kfro kfrr kkaa kkar kkfr kkkk kkoa kkoo kkor kkrf kkrk kkro kkrr koak koar kofa koff kofk kofo koka kokf kokk koko kokr kook kooo koor kora korf kork koro korr krak krar krff krfo krka krkk krko krkr kroa krof krok kroo kror krrf krrk krro krrr oafo oara off- offa offo offr ofor ofra okak okka okko okok okor okra okro ooaa ooak ooff oooo oora orak orao orar orff orka orko oro- orof orok oror orra orro raaf raak rafa raff raka rakk raok rara rarf rark raro rkkf roaf roak roar roff rofo roka rokk roko rokr roof rook roor rora rork roro rrrr