a-a a-b aaa aab aad aah aak aan aao aas ab- aba abb abd abh abk abn abo abs ad- ada adb add adh adk adn ado ads aha ahb ahd ahh ahk ahn aho ahs aka akb akd akh akk akn ako aks an- ana anb and anh ank ann ano ans aoa aob aod aoh aok aon aoo aos as- asa asb asd ash ask asn aso ass baa bab bad bah bak ban bao bas bba bbb bbd bbh bbk bbn bbo bbs bda bdb bdd bdh bdk bdo bds bha bhb bhd bhh bhk bho bhs bka bkb bkk bkn bko bks bna bnb bnd bnk bnn bno bns boa bob bod boh bok bon boo bos bsa bsb bsd bsh bsk bsn bso bss daa dab dad dah dak dan dao das dba dbb dbd dbh dbk dbn dbo dbs dda ddb ddd ddh ddk ddn ddo dds dh- dha dhb dhd dhh dhk dho dhs dka dkb dkk dko dks dna dnb dnd dnh dnk dnn dno dns doa dob dod doh dok don doo dos dsa dsb dsd dsh dsk dsn dso dss haa hab had hah hak han hao has hba hbb hbd hbh hbk hbn hbo hbs hda hdb hdd hdh hdk hdn hdo hds hha hhb hhd hhh hhk hhn hho hhs hka hkb hkd hkh hkk hkn hko hks hna hnb hnd hnh hnk hnn hno hns hoa hob hod hoh hok hon hoo hos hsa hsb hsd hsh hsk hsn hss ka- kaa kab kad kah kak kan kao kas kba kbb kbd kbh kbk kbn kbo kbs kda kdb kdh kdk kdo kds kha khh khk khn kho khs kkb kkh kkk kkn kks kn- kna knd knk knn kno koa kob kod koh kok kon koo kos ksa ksb ksd ksh ksk ksn kso kss naa nab nad nah nak nan nao nas nba nbb nbd nbk nbn nbo nbs nda ndb ndd ndh ndk ndn ndo nds nha nhb nhd nhh nhk nhn nhs nka nkk nkn nko nks nna nnb nnh nnk nnn nno nns no- noa nob nod noh nok non noo nos nsa nsb nsd nsh nsk nsn nso nss oaa oab oad oah oak oan oao oas ob- oba obb obd obh obk obn obo obs oda odb odd odh odn odo ods oha ohd ohh ohn oho ohs oka okb okd okk oko oks on- ona onb ond onh onk onn ono ons oo- ooa oob ood ooh ook oon ooo oos os- osa osb osd osh osk osn oso oss saa sab sad sah sak san sao sas sba sbb sbd sbh sbk sbn sbo sbs sda sdb sdd sdh sdk sdn sdo sds sh- sha shb shd shh shk shn sho shs sk- ska skb skd skh skk sko sks sna snb snd snk snn sno sns soa sob sod soh sok son soo sos ss- ssa ssb ssd ssh ssk ssn sso sss