a-a a-b aaa aab aah aaj aak aan aao aar aas ab- aba abb abh abj abk abn abo abr abs aha ahb ahh ahj ahk ahn aho ahr ahs aja ajb ajh ajj ajk ajn ajo ajr ajs aka akb akh akj akk akn ako akr aks an- ana anb anh anj ank ann ano anr ans aoa aob aoh aoj aok aon aoo aor aos ar- ara arb arh arj ark arn aro arr ars as- asa asb ash asj ask asn aso asr ass baa bab bah baj bak ban bao bar bas bba bbb bbh bbk bbn bbo bbr bbs bha bhb bhh bhj bhk bho bhr bhs bja bjj bjk bjn bjr bjs bka bkb bkk bkn bko bkr bks bna bnb bnj bnk bnn bno bnr bns boa bob boh boj bok bon boo bor bos bra brb brh brj brk brn bro brr brs bsa bsb bsh bsj bsk bsn bso bsr bss haa hab hah haj hak han hao har has hba hbb hbh hbj hbk hbn hbo hbr hbs hha hhb hhh hhj hhk hhn hho hhr hhs hja hjk hjn hjo hjr hjs hka hkb hkh hkk hkn hko hkr hks hna hnb hnh hnj hnk hnn hno hns hoa hob hoh hok hon hoo hor hos hr- hra hrb hrh hrj hrk hrn hro hrr hrs hsa hsb hsh hsj hsk hsn hsr hss jaa jab jah jaj jak jan jao jar jas jba jbj jbk jbo jbr jbs jha jhj jhn jho jhr jhs jja jjb jjj jjk jjr jjs jka jkb jkh jkk jkn jko jkr jks jna jnh jnj jnn jno jnr jns joa job joh joj jok jon joo jor jos jra jrb jrk jrn jro jrr jrs jsa jsb jsh jsj jsk jsn jso jsr jss ka- kaa kab kah kaj kak kan kao kar kas kba kbb kbh kbk kbn kbo kbr kbs kha khh khj khk khn kho khr khs kjb kjr kjs kkb kkh kkk kkn kkr kks kn- kna knk knn kno knr koa kob koh kok kon koo kor kos kra krk krn kro krr krs ksa ksb ksh ksk ksn kso ksr kss naa nab nah naj nak nan nao nar nas nba nbb nbk nbn nbo nbr nbs nha nhb nhh nhj nhk nhn nhr nhs nja njk njn njs nka nkj nkk nkn nko nkr nks nna nnb nnh nnk nnn nno nns no- noa nob noh noj nok non noo nor nos nra nrb nrj nrk nrn nro nrr nrs nsa nsb nsh nsk nsn nso nsr nss oaa oab oah oaj oak oan oao oar oas ob- oba obb obh obj obk obn obo obr obs oha ohh ohn oho ohr ohs oja ojb ojo ojs oka okb okj okk oko okr oks on- ona onb onh onj onk onn ono onr ons oo- ooa oob ooh ook oon ooo oor oos or- ora orb orh ork orn oro orr ors os- osa osb osh osj osk osn oso osr oss ra- raa rab rah raj rak ran rao rar ras rba rbb rbh rbk rbn rbo rbr rbs rh- rha rhb rhh rhn rho rhr rhs rja rjk rjr rkb rkk rko rks rna rnb rnh rnn rno rnr rns roa rob roh roj rok ron roo ror ros rra rrb rrh rrk rrn rrr rrs rsa rsb rsh rsj rsk rsn rso rsr rss saa sab sah saj sak san sao sar sas sba sbb sbh sbj sbk sbn sbo sbr sbs sh- sha shb shh shk shn sho shr shs sja sjb sjh sjj sjk sjr sjs sk- ska skb skh skj skk sko skr sks sna snb snj snk snn sno snr sns soa sob soh soj sok son soo sor sos sr- sra srb srh srj srk srn sro srr srs ss- ssa ssb ssh ssj ssk ssn sso ssr sss