aaaa aaaf aaar aafa aaff aaoo aara aaro aart aata aatf aatt afaa afao afar afat affa affo afft afoa afoo afor afox afr- afra afro afta aora aort aotf araf arar arat arax arfa arff arft aroa aroo aror arr- arra arro arrr arrt arta arto artr artx at-t at-x ataa atar atat atax atof ator atot atra atro atrx atta atto attr axaf axar axat axfr axo- axoa axof axto axxo faaa fafa faff fafo fara faro farr fart fata fatf fato fatt ffar ffff ffrr fftf foaf foar fofo foof foot for- fora foro forr fort fota foto fott foxx frat frax frot frta oafo oara off- offa offo offr ofor ofra ofta ooaa ooff oooo oora oort orao orar orat orff oro- orof oror orot orra orro orta orto otar oto- otof otoo otor otra otro otta otto oxa- oxo- oxof oxox oxxo raaf raat rafa raff raft rara rarf raro rata ratf rato ratt raxa roaf roar roat roff rofo roof roor root roox rora roro rort rota roto rotr rott roxa roxo rrat rrrr taa- taaf taar taat tafa taff tafo taft taoa taor tara tarf taro tarr tart tata tato tatr tatt tax- taxa taxf taxo taxt tfot tfox toat tofa toff tofo toft tooa toof toor toot tora torf toro torr tort torx tota toto totr tott tox- toxa toxo toxt traa traf trao trat trax trfr troa troo trot trox trra trtr ttfa ttff tttt txaa txtr xaar xara xoro xoxo xtar xtra xtro xxxo xxxx