a-a a-b aaa aab aad aah aak aan aao aar aas ab- aba abb abd abh abk abn abo abr abs ad- ada adb add adh adk adn ado adr ads aha ahb ahd ahh ahk ahn aho ahr ahs aka akb akd akh akk akn ako akr aks an- ana anb and anh ank ann ano anr ans aoa aob aod aoh aok aon aoo aor aos ar- ara arb ard arh ark arn aro arr ars as- asa asb asd ash ask asn aso asr ass baa bab bad bah bak ban bao bar bas bba bbb bbd bbh bbk bbn bbo bbr bbs bda bdb bdd bdh bdk bdo bdr bds bha bhb bhd bhh bhk bho bhr bhs bka bkb bkk bkn bko bkr bks bna bnb bnd bnk bnn bno bnr bns boa bob bod boh bok bon boo bor bos bra brb brd brh brk brn bro brr brs bsa bsb bsd bsh bsk bsn bso bsr bss daa dab dad dah dak dan dao dar das dba dbb dbd dbh dbk dbn dbo dbr dbs dda ddb ddd ddh ddk ddn ddo ddr dds dh- dha dhb dhd dhh dhk dho dhr dhs dka dkb dkk dko dkr dks dna dnb dnd dnh dnk dnn dno dnr dns doa dob dod doh dok don doo dor dos dra drb drd drk drn dro drr drs dsa dsb dsd dsh dsk dsn dso dsr dss haa hab had hah hak han hao har has hba hbb hbd hbh hbk hbn hbo hbr hbs hda hdb hdd hdh hdk hdn hdo hdr hds hha hhb hhd hhh hhk hhn hho hhr hhs hka hkb hkd hkh hkk hkn hko hkr hks hna hnb hnd hnh hnk hnn hno hns hoa hob hod hoh hok hon hoo hor hos hr- hra hrb hrd hrh hrk hrn hro hrr hrs hsa hsb hsd hsh hsk hsn hsr hss ka- kaa kab kad kah kak kan kao kar kas kba kbb kbd kbh kbk kbn kbo kbr kbs kda kdb kdh kdk kdo kdr kds kha khh khk khn kho khr khs kkb kkh kkk kkn kkr kks kn- kna knd knk knn kno knr koa kob kod koh kok kon koo kor kos kra krd krk krn kro krr krs ksa ksb ksd ksh ksk ksn kso ksr kss naa nab nad nah nak nan nao nar nas nba nbb nbd nbk nbn nbo nbr nbs nda ndb ndd ndh ndk ndn ndo ndr nds nha nhb nhd nhh nhk nhn nhr nhs nka nkk nkn nko nkr nks nna nnb nnh nnk nnn nno nns no- noa nob nod noh nok non noo nor nos nra nrb nrd nrk nrn nro nrr nrs nsa nsb nsd nsh nsk nsn nso nsr nss oaa oab oad oah oak oan oao oar oas ob- oba obb obd obh obk obn obo obr obs oda odb odd odh odn odo odr ods oha ohd ohh ohn oho ohr ohs oka okb okd okk oko okr oks on- ona onb ond onh onk onn ono onr ons oo- ooa oob ood ooh ook oon ooo oor oos or- ora orb ord orh ork orn oro orr ors os- osa osb osd osh osk osn oso osr oss ra- raa rab rad rah rak ran rao rar ras rba rbb rbd rbh rbk rbn rbo rbr rbs rda rdb rdd rdh rdn rdo rdr rds rh- rha rhb rhd rhh rhn rho rhr rhs rkb rkk rko rks rna rnb rnd rnh rnn rno rnr rns roa rob rod roh rok ron roo ror ros rra rrb rrd rrh rrk rrn rrr rrs rsa rsb rsd rsh rsk rsn rso rsr rss saa sab sad sah sak san sao sar sas sba sbb sbd sbh sbk sbn sbo sbr sbs sda sdb sdd sdh sdk sdn sdo sdr sds sh- sha shb shd shh shk shn sho shr shs sk- ska skb skd skh skk sko skr sks sna snb snd snk snn sno snr sns soa sob sod soh sok son soo sor sos sr- sra srb srd srh srk srn sro srr srs ss- ssa ssb ssd ssh ssk ssn sso ssr sss