a-a a-b a-i a-t aaa aab aai aam aar aat aax ab- aba abb abi abm abr abt abx ai- aia aib aii aim air ait aix ama amb ami amm amr amt amx ar- ara arb ari arm arr art arx at- ata atb ati atm atr att atx ax- axa axi axm axr axt axx baa bab bai bam bar bat bax bba bbb bbi bbm bbr bbt bbx bi- bia bib bii bim bir bit bix bma bmb bmi bmm bmr bmt bmx bra brb bri brm brr brt brx bta btb bti btm btr btt btx bxb bxi bxm bxx ia- iaa iab iai iam iar iat iba ibb ibi ibm ibr ibt ibx iia iib iii iim iir iit iix im- ima imb imi imm imt imx ir- ira irb iri irm irr irt irx ita itb iti itm itt itx ixi m-r maa mab mai mam mar mat max mba mbb mbi mbm mbr mbt mbx mi- mia mib mii mim mir mit mix mma mmb mmi mmm mmr mmt mmx mra mrb mri mrm mrr mrt mrx mta mtb mti mtm mtr mtt mtx mxa mxi mxr ra- raa rab rai ram rar rat rax rba rbb rbi rbm rbr rbt rbx ria rib rii rim rir rit rix rma rmb rmi rmm rmr rmt rmx rra rrb rri rrm rrr rrt rta rtb rti rtm rtr rtt rtx rxr t-x taa tab tai tam tar tat tax tba tbb tbi tbm tbr tbt tia tib tii tim tir tit tix tma tmb tmi tmm tmr tmt tmx tra trb tri trm trr trt trx tta ttb tti ttm ttr ttt ttx txi txt xaa xam xar xat xbr xbx xia xii xit xix xma xmi xmm xmr xmt xmx xrt xrx xti xtm xtr xtx xxi xxx