a-a aaa aaf aak aao aar aas aaw af- afa aff afk afo afr afs afw aka akk ako akr aks akw aoa aof aok aoo aor aos aow ar- ara arf ark aro arr ars arw as- asa asf ask aso asr ass asw aw- awa awf awk awo awr aws aww faa faf fak fao far fas faw ffa fff ffk ffo ffr ffs ffw fka fkf fkk foa fof fok foo for fos fow fra frf frk fro frr frs frw fsa fsf fsk fso fsr fss fsw fwa fwf fwo fws ka- kaa kaf kak kao kar kas kaw kfa kff kfo kfs kfw kkk kkr kks koa kof kok koo kor kos kow kra krf krk kro krr krs krw ksa ksf ksk kso ksr kss ksw kw- kwa kwf kwk kwo kws kww oaa oaf oak oao oar oas oaw of- ofa off ofo ofr ofs ofw oka okk oko okr oks okw oo- ooa oof ook ooo oor oos oow or- ora orf ork oro orr ors os- osa osf osk oso osr oss osw owa owf owk owo ows oww ra- raa raf rak rao rar ras raw rfa rff rfk rfo rfr rfs rfw rkf rkk rko rks roa rof rok roo ror ros row rra rrf rrk rrr rrs rsa rsf rsk rso rsr rss rsw rwa rwf rwr rws saa saf sak sao sar sas saw sfa sff sfk sfo sfr sfs sfw sk- ska skf skk sko skr sks skw soa sof sok soo sor sos sow sr- sra srf srk sro srr srs srw ss- ssa ssf ssk sso ssr sss ssw swa swf swk swo swr sws waa waf wak wao war was waw wfa wff wfk wfo wfr wfs wfw wka wkf wko wkr wks wkw woa wof wok woo wor wos wow wr- wra wrf wrk wro wrr wrs wrw wsa wsf wsk wso wsr wss wsw wwa wwf wwo www