a-a a-i aaa aaf aag aai aak aan aao aar aas af- afa aff afg afi afk afn afo afr afs ag- aga agf agg agi agk agn ago agr ags ai- aia aif aig aii aik ain aio air ais aka akg aki akk akn ako akr aks an- ana anf ang ani ank ann ano anr ans aoa aof aog aoi aok aon aoo aor aos ar- ara arf arg ari ark arn aro arr ars as- asa asf asg asi ask asn aso asr ass faa faf fag fai fak fan fao far fas ffa fff ffg ffi ffk ffn ffo ffr ffs fga fgf fgg fgi fgn fgr fgs fia fif fig fii fik fin fir fis fka fkf fkg fki fkk fna fnf fng fni fnk fnn fnr fns foa fof fog foi fok fon foo for fos fra frf frg fri frk frn fro frr frs fsa fsf fsg fsi fsk fsn fso fsr fss gaa gaf gag gai gak gan gao gar gas gfa gff gfi gfk gfo gfr gfs gga ggg ggi ggn ggo ggr ggs gia gif gig gii gik gin gio gir gis gka gkn gko gks gna gnf gni gnn gno gnr gns goa gof gog goi gok gon goo gor gos gra grf grg gri grk grn gro grr grs gsa gsf gsg gsi gsk gsn gso gsr gss i-f ia- iaa iaf iag iai ian iao iar ias ifa iff ifg ifi ifn ifo ifr ifs iga igf igg igi igk ign igo igr igs iia iif iii iin iio iir iis ika ikf iki ikk iko ikr iks in- ina inf ing ini ink inn ino inr ins io- ioa iof iog ioi ion ioo ior ios ir- ira irf irg iri irk irn iro irr irs is- isa isf isg isi isk isn iso isr iss ka- kaa kaf kag kai kak kan kao kar kas kfa kff kfg kfi kfo kfs kga kgf kgi kgo kgs kia kif kig kii kik kin kio kir kis kki kkk kkn kkr kks kn- kna knf kng kni knk knn kno knr koa kof kog koi kok kon koo kor kos kra krf krg kri krk krn kro krr krs ksa ksf ksg ksi ksk ksn kso ksr kss n-i naa naf nag nai nak nan nao nar nas nfa nff nfi nfk nfn nfo nfr nfs nga ngf ngg ngi ngk ngn ngo ngs nia nif nig nii nik nin nio nir nis nka nkf nki nkk nkn nko nkr nks nna nnf nng nni nnk nnn nno nns no- noa nof nog noi nok non noo nor nos nra nrf nrg nri nrk nrn nro nrr nrs nsa nsf nsg nsi nsk nsn nso nsr nss o-i oaa oaf oag oai oak oan oao oar oas of- ofa off ofg ofi ofn ofo ofr ofs oga ogf ogg ogi ogn ogo ogs oia oif oii oik oin oio oir ois oka okg oki okk oko okr oks on- ona onf ong oni onk onn ono onr ons oo- ooa oof oog ooi ook oon ooo oor oos or- ora orf org ori ork orn oro orr ors os- osa osf osg osi osk osn oso osr oss ra- raa raf rag rai rak ran rao rar ras rfa rff rfg rfi rfk rfn rfo rfr rfs rga rgf rgg rgi rgk rgn rgo rgr rgs ria rif rig rii rik rin rio rir ris rkf rkg rkk rko rks rna rng rni rnn rno rnr rns roa rof rog roi rok ron roo ror ros rra rrf rrg rri rrk rrn rrr rrs rsa rsf rsg rsi rsk rsn rso rsr rss saa saf sag sai sak san sao sar sas sfa sff sfg sfi sfk sfn sfo sfr sfs sga sgf sgg sgi sgk sgn sgo sgr sgs sia sif sig sii sik sin sio sir sis sk- ska skf skg ski skk sko skr sks sna snf sng sni snk snn sno snr sns soa sof sog soi sok son soo sor sos sr- sra srf srg sri srk srn sro srr srs ss- ssa ssf ssg ssi ssk ssn sso ssr sss