a-a a-b a-i aaa aab aag aai aam aan aao aar aas ab- aba abb abg abi abm abn abo abr abs ag- aga agb agg agi agm agn ago agr ags ai- aia aib aig aii aim ain aio air ais ama amb amg ami amm amn amo amr ams an- ana anb ang ani anm ann ano anr ans aoa aob aog aoi aom aon aoo aor aos ar- ara arb arg ari arm arn aro arr ars as- asa asb asg asi asm asn aso asr ass baa bab bag bai bam ban bao bar bas bba bbb bbg bbi bbm bbn bbo bbr bbs bga bgb bgg bgi bgm bgn bgo bgr bgs bi- bia bib big bii bim bin bio bir bis bma bmb bmg bmi bmm bmn bmo bmr bms bna bnb bng bni bnn bno bnr bns boa bob bog boi bom bon boo bor bos bra brb brg bri brm brn bro brr brs bsa bsb bsg bsi bsm bsn bso bsr bss gaa gab gag gai gam gan gao gar gas gba gbg gbi gbm gbn gbo gbr gbs gga ggb ggg ggi ggm ggn ggo ggr ggs gia gib gig gii gim gin gio gir gis gma gmb gmg gmi gmm gmn gmo gmr gms gna gnb gni gnm gnn gno gnr gns goa gob gog goi gom gon goo gor gos gra grb grg gri grm grn gro grr grs gsa gsb gsg gsi gsm gsn gso gsr gss ia- iaa iab iag iai iam ian iao iar ias iba ibb ibg ibi ibm ibn ibo ibr ibs iga igb igg igi igm ign igo igr igs iia iib iii iim iin iio iir iis im- ima imb img imi imm imn imo ims in- ina inb ing ini inm inn ino inr ins io- ioa iob iog ioi iom ion ioo ior ios ir- ira irb irg iri irm irn iro irr irs is- isa isb isg isi ism isn iso isr iss m-o m-r maa mab mag mai mam man mao mar mas mba mbb mbg mbi mbm mbo mbr mbs mga mgb mgi mgm mgn mgo mgr mgs mi- mia mib mig mii mim min mio mir mis mma mmb mmg mmi mmm mmn mmo mmr mms mna mnb mng mni mnm mnn mno mnr mns moa mob mog moi mom mon moo mor mos mra mrb mrg mri mrm mrn mro mrr mrs msa msb msg msi msm msn mso msr mss n-i naa nab nag nai nam nan nao nar nas nba nbb nbg nbi nbm nbn nbo nbr nbs nga ngb ngg ngi ngm ngn ngo ngs nia nib nig nii nim nin nio nir nis nma nmb nmg nmi nmm nmn nmo nmr nms nna nnb nng nni nnm nnn nno nns no- noa nob nog noi nom non noo nor nos nra nrb nrg nri nrm nrn nro nrr nrs nsa nsb nsg nsi nsm nsn nso nsr nss o-i oaa oab oag oai oam oan oao oar oas ob- oba obb obg obi obm obn obo obr obs oga ogg ogi ogn ogo ogs oia oib oii oim oin oio oir ois om- oma omb omg omi omm omn omo omr oms on- ona onb ong oni onn ono onr ons oo- ooa oob oog ooi oom oon ooo oor oos or- ora orb org ori orm orn oro orr ors os- osa osb osg osi osm osn oso osr oss ra- raa rab rag rai ram ran rao rar ras rba rbb rbg rbi rbm rbn rbo rbr rbs rga rgb rgg rgi rgn rgo rgr rgs ria rib rig rii rim rin rio rir ris rma rmb rmg rmi rmm rmn rmo rmr rms rna rnb rng rni rnm rnn rno rnr rns roa rob rog roi rom ron roo ror ros rra rrb rrg rri rrm rrn rrr rrs rsa rsb rsg rsi rsm rsn rso rsr rss saa sab sag sai sam san sao sar sas sba sbb sbg sbi sbm sbn sbo sbr sbs sga sgb sgg sgi sgm sgn sgo sgr sgs sia sib sig sii sim sin sio sir sis sma smb smg smi smm smn smo smr sms sna snb sng sni snm snn sno snr sns soa sob sog soi som son soo sor sos sr- sra srb srg sri srm srn sro srr srs ss- ssa ssb ssg ssi ssm ssn sso ssr sss