a-a a-b a-i aaa aab aag aai aak aan aao aar aas ab- aba abb abg abi abk abn abo abr abs ag- aga agb agg agi agk agn ago agr ags ai- aia aib aig aii aik ain aio air ais aka akb akg aki akk akn ako akr aks an- ana anb ang ani ank ann ano anr ans aoa aob aog aoi aok aon aoo aor aos ar- ara arb arg ari ark arn aro arr ars as- asa asb asg asi ask asn aso asr ass baa bab bag bai bak ban bao bar bas bba bbb bbg bbi bbk bbn bbo bbr bbs bga bgb bgg bgi bgk bgn bgo bgr bgs bi- bia bib big bii bik bin bio bir bis bka bkb bkg bkk bkn bko bkr bks bna bnb bng bni bnk bnn bno bnr bns boa bob bog boi bok bon boo bor bos bra brb brg bri brk brn bro brr brs bsa bsb bsg bsi bsk bsn bso bsr bss gaa gab gag gai gak gan gao gar gas gba gbg gbi gbk gbn gbo gbr gbs gga ggb ggg ggi ggn ggo ggr ggs gia gib gig gii gik gin gio gir gis gka gkb gkn gko gks gna gnb gni gnn gno gnr gns goa gob gog goi gok gon goo gor gos gra grb grg gri grk grn gro grr grs gsa gsb gsg gsi gsk gsn gso gsr gss ia- iaa iab iag iai ian iao iar ias iba ibb ibg ibi ibk ibn ibo ibr ibs iga igb igg igi igk ign igo igr igs iia iib iii iin iio iir iis ika ikb iki ikk iko ikr iks in- ina inb ing ini ink inn ino inr ins io- ioa iob iog ioi ion ioo ior ios ir- ira irb irg iri irk irn iro irr irs is- isa isb isg isi isk isn iso isr iss ka- kaa kab kag kai kak kan kao kar kas kba kbb kbi kbk kbn kbo kbr kbs kga kgb kgi kgo kgs kia kib kig kii kik kin kio kir kis kkb kki kkk kkn kkr kks kn- kna kng kni knk knn kno knr koa kob kog koi kok kon koo kor kos kra krg kri krk krn kro krr krs ksa ksb ksg ksi ksk ksn kso ksr kss n-i naa nab nag nai nak nan nao nar nas nba nbb nbg nbi nbk nbn nbo nbr nbs nga ngb ngg ngi ngk ngn ngo ngs nia nib 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 nog noi nok non noo nor nos nra nrb nrg nri nrk nrn nro nrr nrs nsa nsb nsg nsi nsk nsn nso nsr nss o-i oaa oab oag oai oak oan oao oar oas ob- oba obb obg obi obk obn obo obr obs oga ogg ogi ogn ogo ogs oia oib oii oik oin oio oir ois oka okb okg oki okk oko okr oks on- ona onb ong oni onk onn ono onr ons oo- ooa oob oog ooi ook oon ooo oor oos or- ora orb org ori ork orn oro orr ors os- osa osb osg osi osk osn oso osr oss ra- raa rab rag rai rak ran rao rar ras rba rbb rbg rbi rbk rbn rbo rbr rbs rga rgb rgg rgi rgk rgn rgo rgr rgs ria rib rig rii rik rin rio rir ris rkb rkg rkk rko rks rna rnb rng rni rnn rno rnr rns roa rob rog roi rok ron roo ror ros rra rrb rrg rri rrk rrn rrr rrs rsa rsb rsg rsi rsk rsn rso rsr rss saa sab sag sai sak san sao sar sas sba sbb sbg sbi sbk sbn sbo sbr sbs sga sgb sgg sgi sgk sgn sgo sgr sgs sia sib sig sii sik sin sio sir sis sk- ska skb skg ski skk sko skr sks sna snb sng sni snk snn sno snr sns soa sob sog soi sok son soo sor sos sr- sra srb srg sri srk srn sro srr srs ss- ssa ssb ssg ssi ssk ssn sso ssr sss