a-a a-b a-i aaa aab aad aag aai aak aan aao aar aas ab- aba abb abd abg abi abk abn abo abr abs ad- ada adb add adg adi adk adn ado adr ads ag- aga agb agd agg agi agk agn ago agr ags ai- aia aib aid aig aii aik ain aio air ais aka akb akd akg aki akk akn ako akr aks an- ana anb and ang ani ank ann ano anr ans aoa aob aod aog aoi aok aon aoo aor aos ar- ara arb ard arg ari ark arn aro arr ars as- asa asb asd asg asi ask asn aso asr ass baa bab bad bag bai bak ban bao bar bas bba bbb bbd bbg bbi bbk bbn bbo bbr bbs bda bdb bdd bdg bdi bdk bdo bdr bds bga bgb bgd bgg bgi bgk bgn bgo bgr bgs bi- bia bib bid big bii bik bin bio bir bis bka bkb bkg bkk bkn bko bkr bks bna bnb bnd bng bni bnk bnn bno bnr bns boa bob bod bog boi bok bon boo bor bos bra brb brd brg bri brk brn bro brr brs bsa bsb bsd bsg bsi bsk bsn bso bsr bss daa dab dad dag dai dak dan dao dar das dba dbb dbd dbg dbi dbk dbn dbo dbr dbs dda ddb ddd ddg ddi ddk ddn ddo ddr dds dga dgd dgg dgi dgk dgn dgr dgs di- dia dib did dig dii dik din dio dir dis dka dkb dkg dki dkk dko dkr dks dna dnb dnd dng dni dnk dnn dno dnr dns doa dob dod dog doi dok don doo dor dos dra drb drd drg dri drk drn dro drr drs dsa dsb dsd dsg dsi dsk dsn dso dsr dss g-d gaa gab gad gag gai gak gan gao gar gas gba gbd gbg gbi gbk gbn gbo gbr gbs gda gdb gdd gdi gdk gdn gdo gdr gds gga ggb ggd ggg ggi ggn ggo ggr ggs gia gib gid gig gii gik gin gio gir gis gka gkb gkd gkn gko gks gna gnb gnd gni gnn gno gnr gns goa gob god gog goi gok gon goo gor gos gra grb grd grg gri grk grn gro grr grs gsa gsb gsd gsg gsi gsk gsn gso gsr gss i-d ia- iaa iab iad iag iai ian iao iar ias iba ibb ibd ibg ibi ibk ibn ibo ibr ibs ida idb idd idg idi idk idn ido idr ids iga igb igd igg igi igk ign igo igr igs iia iib iid iii iin iio iir iis ika ikb iki ikk iko ikr iks in- ina inb ind ing ini ink inn ino inr ins io- ioa iob iod iog ioi ion ioo ior ios ir- ira irb ird irg iri irk irn iro irr irs is- isa isb isd isg isi isk isn iso isr iss ka- kaa kab kad kag kai kak kan kao kar kas kba kbb kbd kbi kbk kbn kbo kbr kbs kda kdb kdg kdk kdo kdr kds kga kgb kgd kgi kgo kgs kia kib kid kig kii kik kin kio kir kis kkb kki kkk kkn kkr kks kn- kna knd kng kni knk knn kno knr koa kob kod kog koi kok kon koo kor kos kra krd krg kri krk krn kro krr krs ksa ksb ksd ksg ksi ksk ksn kso ksr kss n-i naa nab nad nag nai nak nan nao nar nas nba nbb nbd nbg nbi nbk nbn nbo nbr nbs nda ndb ndd ndg ndi ndk ndn ndo ndr nds nga ngb ngd ngg ngi ngk ngn ngo ngs nia nib nid nig nii nik nin nio nir nis nka nki nkk nkn nko nkr nks nna nnb nng nni nnk nnn nno nns no- noa nob nod nog noi nok non noo nor nos nra nrb nrd nrg nri nrk nrn nro nrr nrs nsa nsb nsd nsg nsi nsk nsn nso nsr nss o-i oaa oab oad oag oai oak oan oao oar oas ob- oba obb obd obg obi obk obn obo obr obs oda odb odd odg odi odn odo odr ods oga ogd ogg ogi ogn ogo ogs oia oib oid oii oik oin oio oir ois oka okb okd okg oki okk oko okr oks on- ona onb ond ong oni onk onn ono onr ons oo- ooa oob ood oog ooi ook oon ooo oor oos or- ora orb ord org ori ork orn oro orr ors os- osa osb osd osg osi osk osn oso osr oss ra- raa rab rad rag rai rak ran rao rar ras rba rbb rbd rbg rbi rbk rbn rbo rbr rbs rda rdb rdd rdg rdi rdn rdo rdr rds rga rgb rgd rgg rgi rgk rgn rgo rgr rgs ria rib rid rig rii rik rin rio rir ris rkb rkg rkk rko rks rna rnb rnd rng rni rnn rno rnr rns roa rob rod rog roi rok ron roo ror ros rra rrb rrd rrg rri rrk rrn rrr rrs rsa rsb rsd rsg rsi rsk rsn rso rsr rss saa sab sad sag sai sak san sao sar sas sba sbb sbd sbg sbi sbk sbn sbo sbr sbs sda sdb sdd sdg sdi sdk sdn sdo sdr sds sga sgb sgd sgg sgi sgk sgn sgo sgr sgs sia sib sid sig sii sik sin sio sir sis sk- ska skb skd skg ski skk sko skr sks sna snb snd sng sni snk snn sno snr sns soa sob sod sog soi sok son soo sor sos sr- sra srb srd srg sri srk srn sro srr srs ss- ssa ssb ssd ssg ssi ssk ssn sso ssr sss