a-a a-t aaa aaf aak aao aar aas aat aav af- afa aff afk afo afr afs aft afv aka akk ako akr aks akv aoa aof aok aoo aor aos aot aov ar- ara arf ark aro arr ars art arv as- asa asf ask aso asr ass ast asv at- ata atf ato atr ats att atv av- ava avf avk avo avr avs avt faa faf fak fao far fas fat fav ffa fff ffk ffo ffr ffs fft ffv fka fkf fkk fkt foa fof fok foo for fos fot fra frf frk fro frr frs frt fsa fsf fsk fso fsr fss fst fsv fta ftf ftk fto ftr fts ftt ftv fva fvk fvt k-t ka- kaa kaf kak kao kar kas kat kav kfa kff kfo kfs kkk kkr kks kkt kkv koa kof kok koo kor kos kot kra krf krk kro krr krs krt krv ksa ksf ksk kso ksr kss kst ksv kta ktf ktk kto ktr kts ktt ktv kva kvk kvo kvr kvs kvv oaa oaf oak oao oar oas oat oav of- ofa off ofo ofr ofs oft ofv oka okk oko okr oks oo- ooa oof ook ooo oor oos oot oov or- ora orf ork oro orr ors ort orv os- osa osf osk oso osr oss ost osv ot- ota otf otk oto otr ots ott otv ov- ova ovf ovo ovs ovv ra- raa raf rak rao rar ras rat rav rfa rff rfk rfo rfr rfs rft rfv rkf rkk rko rks rkt rkv roa rof rok roo ror ros rot rov rra rrf rrk rrr rrs rrt rsa rsf rsk rso rsr rss rst rsv rta rtf rtk rto rtr rts rtt rtv rva rvf rvo rvr rvs rvt rvv saa saf sak sao sar sas sat sav sfa sff sfk sfo sfr sfs sft sfv sk- ska skf skk sko skr sks skt soa sof sok soo sor sos sot sov sr- sra srf srk sro srr srs srt srv ss- ssa ssf ssk sso ssr sss sst ssv sta stf stk sto str sts stt stv sva svf svk svo svr svs svt svv taa taf tak tao tar tas tat tav tfa tff tfk tfo tfr tfs tft tka tkk tko tkr tks tkt to- toa tof tok too tor tos tot tov tra trf trk tro trr trs trt trv tsa tsf tsk tso tsr tss tst tsv tta ttf ttk tto ttr tts ttt ttv tva tvf tvk tvo tvr tvs tvt v-a vaa vak vao var vas vat vav vfa vff vfr vfs vft vfv vka vkt voa vof vok voo vor vos vot vov vra vrf vrk vrr vrs vrt vsa vsf vsk vso vsr vss vst vsv vta vtk vto vtr vts vtt vtv vva vvo vvr vvs vvt vvv