a-a a-b a-i a-t aaa aab aai aam aao aar aat aax ab- aba abb abi abm abo abr abt abx ai- aia aib aii aim aio air ait aix ama amb ami amm amo amr amt amx aoa aob aoi aom aoo aor aot aox ar- ara arb ari arm aro arr art arx at- ata atb ati atm ato atr att atx ax- axa axi axm axo axr axt axx baa bab bai bam bao bar bat bax bba bbb bbi bbm bbo bbr bbt bbx bi- bia bib bii bim bio bir bit bix bma bmb bmi bmm bmo bmr bmt bmx boa bob boi bom boo bor bot box bra brb bri brm bro brr brt brx bta btb bti btm bto btr btt btx bxb bxi bxm bxo bxx ia- iaa iab iai iam iao iar iat iba ibb ibi ibm ibo ibr ibt ibx iia iib iii iim iio iir iit iix im- ima imb imi imm imo imt imx io- ioa iob ioi iom ioo ior iot ir- ira irb iri irm iro irr irt irx ita itb iti itm ito itt itx ixi m-o m-r maa mab mai mam mao mar mat max mba mbb mbi mbm mbo mbr mbt mbx mi- mia mib mii mim mio mir mit mix mma mmb mmi mmm mmo mmr mmt mmx moa mob moi mom moo mor mot mox mra mrb mri mrm mro mrr mrt mrx mta mtb mti mtm mto mtr mtt mtx mxa mxi mxr o-i oaa oab oai oam oao oar oat oax ob- oba obb obi obm obo obr obt obx oia oib oii oim oio oir oit om- oma omb omi omm omo omr omt omx oo- ooa oob ooi oom ooo oor oot oox or- ora orb ori orm oro orr ort orx ot- ota otb oti otm oto otr ott ox- oxa oxb oxi oxo oxt oxx ra- raa rab rai ram rao rar rat rax rba rbb rbi rbm rbo rbr rbt rbx ria rib rii rim rio rir rit rix rma rmb rmi rmm rmo rmr rmt rmx roa rob roi rom roo ror rot rox rra rrb rri rrm rrr rrt rta rtb rti rtm rto rtr rtt rtx rxr t-x taa tab tai tam tao tar tat tax tba tbb tbi tbm tbo tbr tbt tia tib tii tim tio tir tit tix tma tmb tmi tmm tmo tmr tmt tmx to- toa tob toi tom too tor tot tox tra trb tri trm tro trr trt trx tta ttb tti ttm tto ttr ttt ttx txi txt xaa xam xar xat xbr xbx xia xii xio xit xix xma xmi xmm xmo xmr xmt xmx xoa xoi xom xoo xor xot xox xrt xrx xti xtm xtr xtx xxi xxo xxx