a-a a-b aaa aab aah aan aar aas ab- aba abb abh abn abr abs aha ahb ahh ahn ahr ahs an- ana anb anh ann anr ans ar- ara arb arh arn arr ars as- asa asb ash asn asr ass baa bab bah ban bar bas bba bbb bbh bbn bbr bbs bha bhb bhh bhr bhs bna bnb bnn bnr bns bra brb brh brn brr brs bsa bsb bsh bsn bsr bss haa hab hah han har has hba hbb hbh hbn hbr hbs hha hhb hhh hhn hhr hhs hna hnb hnh hnn hns hr- hra hrb hrh hrn hrr hrs hsa hsb hsh hsn hsr hss naa nab nah nan nar nas nba nbb nbn nbr nbs nha nhb nhh nhn nhr nhs nna nnb nnh nnn nns nra nrb nrn nrr nrs nsa nsb nsh nsn nsr nss ra- raa rab rah ran rar ras rba rbb rbh rbn rbr rbs rh- rha rhb rhh rhn rhr rhs rna rnb rnh rnn rnr rns rra rrb rrh rrn rrr rrs rsa rsb rsh rsn rsr rss saa sab sah san sar sas sba sbb sbh sbn sbr sbs sh- sha shb shh shn shr shs sna snb snn snr sns sr- sra srb srh srn srr srs ss- ssa ssb ssh ssn ssr sss