a-a a-b a-i a-t aaa aab aai aam aan aao aar aat ab- aba abb abi abm abn abo abr abt ai- aia aib aii aim ain aio air ait ama amb ami amm amn amo amr amt an- ana anb ani anm ann ano anr ant aoa aob aoi aom aon aoo aor aot ar- ara arb ari arm arn aro arr art at- ata atb ati atm atn ato atr att baa bab bai bam ban bao bar bat bba bbb bbi bbm bbn bbo bbr bbt bi- bia bib bii bim bin bio bir bit bma bmb bmi bmm bmn bmo bmr bmt bna bnb bni bnn bno bnr bnt boa bob boi bom bon boo bor bot bra brb bri brm brn bro brr brt bta btb bti btm btn bto btr btt ia- iaa iab iai iam ian iao iar iat iba ibb ibi ibm ibn ibo ibr ibt iia iib iii iim iin iio iir iit im- ima imb imi imm imn imo imt in- ina inb ini inm inn ino inr int io- ioa iob ioi iom ion ioo ior iot ir- ira irb iri irm irn iro irr irt ita itb iti itm itn ito itt m-o m-r maa mab mai mam man mao mar mat mba mbb mbi mbm mbo mbr mbt mi- mia mib mii mim min mio mir mit mma mmb mmi mmm mmn mmo mmr mmt mna mnb mni mnm mnn mno mnr mnt moa mob moi mom mon moo mor mot mra mrb mri mrm mrn mro mrr mrt mta mtb mti mtm mtn mto mtr mtt n-i naa nab nai nam nan nao nar nat nba nbb nbi nbm nbn nbo nbr nbt nia nib nii nim nin nio nir nit nma nmb nmi nmm nmn nmo nmr nmt nna nnb nni nnm nnn nno nnt no- noa nob noi nom non noo nor not nra nrb nri nrm nrn nro nrr nrt nta ntb nti ntm ntn nto ntr ntt o-i oaa oab oai oam oan oao oar oat ob- oba obb obi obm obn obo obr obt oia oib oii oim oin oio oir oit om- oma omb omi omm omn omo omr omt on- ona onb oni onn ono onr ont oo- ooa oob ooi oom oon ooo oor oot or- ora orb ori orm orn oro orr ort ot- ota otb oti otm otn oto otr ott ra- raa rab rai ram ran rao rar rat rba rbb rbi rbm rbn rbo rbr rbt ria rib rii rim rin rio rir rit rma rmb rmi rmm rmn rmo rmr rmt rna rnb rni rnm rnn rno rnr rnt roa rob roi rom ron roo ror rot rra rrb rri rrm rrn rrr rrt rta rtb rti rtm rtn rto rtr rtt taa tab tai tam tan tao tar tat tba tbb tbi tbm tbn tbo tbr tbt tia tib tii tim tin tio tir tit tma tmb tmi tmm tmn tmo tmr tmt tna tnb tni tnm tnn tno tnr tnt to- toa tob toi tom ton too tor tot tra trb tri trm trn tro trr trt tta ttb tti ttm ttn tto ttr ttt