a-a a-b a-i aaa aab aag aai aam aan aao aar ab- aba abb abg abi abm abn abo abr ag- aga agb agg agi agm agn ago agr ai- aia aib aig aii aim ain aio air ama amb amg ami amm amn amo amr an- ana anb ang ani anm ann ano anr aoa aob aog aoi aom aon aoo aor ar- ara arb arg ari arm arn aro arr baa bab bag bai bam ban bao bar bba bbb bbg bbi bbm bbn bbo bbr bga bgb bgg bgi bgm bgn bgo bgr bi- bia bib big bii bim bin bio bir bma bmb bmg bmi bmm bmn bmo bmr bna bnb bng bni bnn bno bnr boa bob bog boi bom bon boo bor bra brb brg bri brm brn bro brr gaa gab gag gai gam gan gao gar gba gbg gbi gbm gbn gbo gbr gga ggb ggg ggi ggm ggn ggo ggr gia gib gig gii gim gin gio gir gma gmb gmg gmi gmm gmn gmo gmr gna gnb gni gnm gnn gno gnr goa gob gog goi gom gon goo gor gra grb grg gri grm grn gro grr ia- iaa iab iag iai iam ian iao iar iba ibb ibg ibi ibm ibn ibo ibr iga igb igg igi igm ign igo igr iia iib iii iim iin iio iir im- ima imb img imi imm imn imo in- ina inb ing ini inm inn ino inr io- ioa iob iog ioi iom ion ioo ior ir- ira irb irg iri irm irn iro irr m-o m-r maa mab mag mai mam man mao mar mba mbb mbg mbi mbm mbo mbr mga mgb mgi mgm mgn mgo mgr mi- mia mib mig mii mim min mio mir mma mmb mmg mmi mmm mmn mmo mmr mna mnb mng mni mnm mnn mno mnr moa mob mog moi mom mon moo mor mra mrb mrg mri mrm mrn mro mrr n-i naa nab nag nai nam nan nao nar nba nbb nbg nbi nbm nbn nbo nbr nga ngb ngg ngi ngm ngn ngo nia nib nig nii nim nin nio nir nma nmb nmg nmi nmm nmn nmo nmr nna nnb nng nni nnm nnn nno no- noa nob nog noi nom non noo nor nra nrb nrg nri nrm nrn nro nrr o-i oaa oab oag oai oam oan oao oar ob- oba obb obg obi obm obn obo obr oga ogg ogi ogn ogo oia oib oii oim oin oio oir om- oma omb omg omi omm omn omo omr on- ona onb ong oni onn ono onr oo- ooa oob oog ooi oom oon ooo oor or- ora orb org ori orm orn oro orr ra- raa rab rag rai ram ran rao rar rba rbb rbg rbi rbm rbn rbo rbr rga rgb rgg rgi rgn rgo rgr ria rib rig rii rim rin rio rir rma rmb rmg rmi rmm rmn rmo rmr rna rnb rng rni rnm rnn rno rnr roa rob rog roi rom ron roo ror rra rrb rrg rri rrm rrn rrr