a-a aaa aak aao aar aas aaw aka akk ako akr aks akw aoa aok aoo aor aos aow ar- ara ark aro arr ars arw as- asa ask aso asr ass asw aw- awa awk awo awr aws aww ka- kaa kak kao kar kas kaw kkk kkr kks koa kok koo kor kos kow kra krk kro krr krs krw ksa ksk kso ksr kss ksw kw- kwa kwk kwo kws kww oaa oak oao oar oas oaw oka okk oko okr oks okw oo- ooa ook ooo oor oos oow or- ora ork oro orr ors os- osa osk oso osr oss osw owa owk owo ows oww ra- raa rak rao rar ras raw rkk rko rks roa rok roo ror ros row rra rrk rrr rrs rsa rsk rso rsr rss rsw rwa rwr rws saa sak sao sar sas saw sk- ska skk sko skr sks skw soa sok soo sor sos sow sr- sra srk sro srr srs srw ss- ssa ssk sso ssr sss ssw swa swk swo swr sws waa wak wao war was waw wka wko wkr wks wkw woa wok woo wor wos wow wr- wra wrk wro wrr wrs wrw wsa wsk wso wsr wss wsw wwa wwo www