a-a a-b aaa aab aad aaf aah aan aar aas ab- aba abb abd abf abh abn abr abs ad- ada adb add adf adh adn adr ads af- afa afb afd aff afh afn afr afs aha ahb ahd ahf ahh ahn ahr ahs an- ana anb and anf anh ann anr ans ar- ara arb ard arf arh arn arr ars as- asa asb asd asf ash asn asr ass baa bab bad baf bah ban bar bas bba bbb bbd bbf bbh bbn bbr bbs bda bdb bdd bdf bdh bdr bds bfa bfb bfd bff bfh bfn bfr bfs bha bhb bhd bhf bhh bhr bhs bna bnb bnd bnf bnn bnr bns bra brb brd brf brh brn brr brs bsa bsb bsd bsf bsh bsn bsr bss daa dab dad daf dah dan dar das dba dbb dbd dbf dbh dbn dbr dbs dda ddb ddd ddf ddh ddn ddr dds dfa dfb dfd dff dfh dfn dfr dfs dh- dha dhb dhd dhf dhh dhr dhs dna dnb dnd dnf dnh dnn dnr dns dra drb drd drn drr drs dsa dsb dsd dsf dsh dsn dsr dss faa fab fad faf fah fan far fas fba fbb fbd fbf fbh fbn fbr fbs fda fdb fdd fdf fdh fdn fdr fds ffa ffd fff ffh ffn ffr ffs fha fhb fhf fhh fhn fhr fhs fna fnb fnd fnf fnh fnn fnr fns fra frb frd frf frh frn frr frs fsa fsb fsd fsf fsh fsn fsr fss haa hab had haf hah han har has hba hbb hbd hbf hbh hbn hbr hbs hda hdb hdd hdf hdh hdn hdr hds hfa hfb hfd hff hfh hfn hfr hfs hha hhb hhd hhf hhh hhn hhr hhs hna hnb hnd hnf hnh hnn hns hr- hra hrb hrd hrf hrh hrn hrr hrs hsa hsb hsd hsf hsh hsn hsr hss naa nab nad naf nah nan nar nas nba nbb nbd nbf nbn nbr nbs nda ndb ndd ndf ndh ndn ndr nds nfa nfb nfd nff nfn nfr nfs nha nhb nhd nhf nhh nhn nhr nhs nna nnb nnf nnh nnn nns nra nrb nrd nrf nrn nrr nrs nsa nsb nsd nsf nsh nsn nsr nss ra- raa rab rad raf rah ran rar ras rba rbb rbd rbf rbh rbn rbr rbs rda rdb rdd rdf rdh rdn rdr rds rfa rfb rfd rff rfh rfn rfr rfs rh- rha rhb rhd rhf rhh rhn rhr rhs rna rnb rnd rnh rnn rnr rns rra rrb rrd rrf rrh rrn rrr rrs rsa rsb rsd rsf rsh rsn rsr rss saa sab sad saf sah san sar sas sba sbb sbd sbf sbh sbn sbr sbs sda sdb sdd sdf sdh sdn sdr sds sfa sfb sfd sff sfh sfn sfr sfs sh- sha shb shd shf shh shn shr shs sna snb snd snf snn snr sns sr- sra srb srd srf srh srn srr srs ss- ssa ssb ssd ssf ssh ssn ssr sss