a-a a-b aaa aab aah aak aan aar aas ab- aba abb abh abk abn abr abs aha ahb ahh ahk ahn ahr ahs aka akb akh akk akn akr aks an- ana anb anh ank ann anr ans ar- ara arb arh ark arn arr ars as- asa asb ash ask asn asr ass baa bab bah bak ban bar bas bba bbb bbh bbk bbn bbr bbs bha bhb bhh bhk bhr bhs bka bkb bkk bkn bkr bks bna bnb bnk bnn bnr bns bra brb brh brk brn brr brs bsa bsb bsh bsk bsn bsr bss haa hab hah hak han har has hba hbb hbh hbk hbn hbr hbs hha hhb hhh hhk hhn hhr hhs hka hkb hkh hkk hkn hkr hks hna hnb hnh hnk hnn hns hr- hra hrb hrh hrk hrn hrr hrs hsa hsb hsh hsk hsn hsr hss ka- kaa kab kah kak kan kar kas kba kbb kbh kbk kbn kbr kbs kha khh khk khn khr khs kkb kkh kkk kkn kkr kks kn- kna knk knn knr kra krk krn krr krs ksa ksb ksh ksk ksn ksr kss naa nab nah nak nan nar nas nba nbb nbk nbn nbr nbs nha nhb nhh nhk nhn nhr nhs nka nkk nkn nkr nks nna nnb nnh nnk nnn nns nra nrb nrk nrn nrr nrs nsa nsb nsh nsk nsn nsr nss ra- raa rab rah rak ran rar ras rba rbb rbh rbk rbn rbr rbs rh- rha rhb rhh rhn rhr rhs rkb rkk rks rna rnb rnh rnn rnr rns rra rrb rrh rrk rrn rrr rrs rsa rsb rsh rsk rsn rsr rss saa sab sah sak san sar sas sba sbb sbh sbk sbn sbr sbs sh- sha shb shh shk shn shr shs sk- ska skb skh skk skr sks sna snb snk snn snr sns sr- sra srb srh srk srn srr srs ss- ssa ssb ssh ssk ssn ssr sss