a-a a-b aaa aab aad aah aan aao aar aas ab- aba abb abd abh abn abo abr abs ad- ada adb add adh adn ado adr ads aha ahb ahd ahh ahn aho ahr ahs an- ana anb and anh ann ano anr ans aoa aob aod aoh aon aoo aor aos ar- ara arb ard arh arn aro arr ars as- asa asb asd ash asn aso asr ass baa bab bad bah ban bao bar bas bba bbb bbd bbh bbn bbo bbr bbs bda bdb bdd bdh bdo bdr bds bha bhb bhd bhh bho bhr bhs bna bnb bnd bnn bno bnr bns boa bob bod boh bon boo bor bos bra brb brd brh brn bro brr brs bsa bsb bsd bsh bsn bso bsr bss daa dab dad dah dan dao dar das dba dbb dbd dbh dbn dbo dbr dbs dda ddb ddd ddh ddn ddo ddr dds dh- dha dhb dhd dhh dho dhr dhs dna dnb dnd dnh dnn dno dnr dns doa dob dod doh don doo dor dos dra drb drd drn dro drr drs dsa dsb dsd dsh dsn dso dsr dss haa hab had hah han hao har has hba hbb hbd hbh hbn hbo hbr hbs hda hdb hdd hdh hdn hdo hdr hds hha hhb hhd hhh hhn hho hhr hhs hna hnb hnd hnh hnn hno hns hoa hob hod hoh hon hoo hor hos hr- hra hrb hrd hrh hrn hro hrr hrs hsa hsb hsd hsh hsn hsr hss naa nab nad nah nan nao nar nas nba nbb nbd nbn nbo nbr nbs nda ndb ndd ndh ndn ndo ndr nds nha nhb nhd nhh nhn nhr nhs nna nnb nnh nnn nno nns no- noa nob nod noh non noo nor nos nra nrb nrd nrn nro nrr nrs nsa nsb nsd nsh nsn nso nsr nss oaa oab oad oah oan oao oar oas ob- oba obb obd obh obn obo obr obs oda odb odd odh odn odo odr ods oha ohd ohh ohn oho ohr ohs on- ona onb ond onh onn ono onr ons oo- ooa oob ood ooh oon ooo oor oos or- ora orb ord orh orn oro orr ors os- osa osb osd osh osn oso osr oss ra- raa rab rad rah ran rao rar ras rba rbb rbd rbh rbn rbo rbr rbs rda rdb rdd rdh rdn rdo rdr rds rh- rha rhb rhd rhh rhn rho rhr rhs rna rnb rnd rnh rnn rno rnr rns roa rob rod roh ron roo ror ros rra rrb rrd rrh rrn rrr rrs rsa rsb rsd rsh rsn rso rsr rss saa sab sad sah san sao sar sas sba sbb sbd sbh sbn sbo sbr sbs sda sdb sdd sdh sdn sdo sdr sds sh- sha shb shd shh shn sho shr shs sna snb snd snn sno snr sns soa sob sod soh son soo sor sos sr- sra srb srd srh srn sro srr srs ss- ssa ssb ssd ssh ssn sso ssr sss