a-a aaa aad aaf aak aao aar aav ad- ada add adf adk ado adr adv af- afa afd aff afk afo afr afv aka akd akk ako akr akv aoa aod aof aok aoo aor aov ar- ara ard arf ark aro arr arv av- ava avd avf avk avo avr daa dad daf dak dao dar dav dda ddd ddf ddk ddo ddr dfa dfd dff dfk dfo dfr dfv dka dkk dko dkr doa dod dof dok doo dor dov dra drd drk dro drr drv dva dvd dvk dvr faa fad faf fak fao far fav fda fdd fdf fdk fdo fdr ffa ffd fff ffk ffo ffr ffv fka fkf fkk foa fof fok foo for fra frd frf frk fro frr fva fvd fvk ka- kaa kad kaf kak kao kar kav kda kdf kdk kdo kdr kfa kfd kff kfo kkk kkr kkv koa kod kof kok koo kor kra krd krf krk kro krr krv kva kvk kvo kvr kvv oaa oad oaf oak oao oar oav oda odd odf odo odr odv of- ofa ofd off ofo ofr ofv oka okd okk oko okr oo- ooa ood oof ook ooo oor oov or- ora ord orf ork oro orr orv ov- ova ovd ovf ovo ovv ra- raa rad raf rak rao rar rav rda rdd rdf rdo rdr rdv rfa rfd rff rfk rfo rfr rfv rkf rkk rko rkv roa rod rof rok roo ror rov rra rrd rrf rrk rrr rva rvd rvf rvo rvr rvv v-a vaa vad vak vao var vav vdd vdf vdk vdo vdr vdv vfa vfd vff vfr vfv vka voa vod vof vok voo vor vov vra vrd vrf vrk vrr vva vvo vvr vvv