a-a a-b a-i aaa aab aai aam aar aax ab- aba abb abi abm abr abx ai- aia aib aii aim air aix ama amb ami amm amr amx ar- ara arb ari arm arr arx ax- axa axi axm axr axx baa bab bai bam bar bax bba bbb bbi bbm bbr bbx bi- bia bib bii bim bir bix bma bmb bmi bmm bmr bmx bra brb bri brm brr brx bxb bxi bxm bxx ia- iaa iab iai iam iar iba ibb ibi ibm ibr ibx iia iib iii iim iir iix im- ima imb imi imm imx ir- ira irb iri irm irr irx ixi m-r maa mab mai mam mar max mba mbb mbi mbm mbr mbx mi- mia mib mii mim mir mix mma mmb mmi mmm mmr mmx mra mrb mri mrm mrr mrx mxa mxi mxr ra- raa rab rai ram rar rax rba rbb rbi rbm rbr rbx ria rib rii rim rir rix rma rmb rmi rmm rmr rmx rra rrb rri rrm rrr rxr xaa xam xar xbr xbx xia xii xix xma xmi xmm xmr xmx xrx xxi xxx