a-a a-b a-i aaa aab aai aam aan aao aax ab- aba abb abi abm abn abo abx ai- aia aib aii aim ain aio aix ama amb ami amm amn amo amx an- ana anb ani anm ann ano anx aoa aob aoi aom aon aoo aox ax- axa axi axm axn axo axx baa bab bai bam ban bao bax bba bbb bbi bbm bbn bbo bbx bi- bia bib bii bim bin bio bix bma bmb bmi bmm bmn bmo bmx bna bnb bni bnn bno bnx boa bob boi bom bon boo box bxb bxi bxm bxn bxo bxx ia- iaa iab iai iam ian iao iba ibb ibi ibm ibn ibo ibx iia iib iii iim iin iio iix im- ima imb imi imm imn imo imx in- ina inb ini inm inn ino inx io- ioa iob ioi iom ion ioo ixi ixn m-o maa mab mai mam man mao max mba mbb mbi mbm mbo mbx mi- mia mib mii mim min mio mix mma mmb mmi mmm mmn mmo mmx mna mnb mni mnm mnn mno moa mob moi mom mon moo mox mxa mxi mxn n-i naa nab nai nam nan nao nax nba nbb nbi nbm nbn nbo nbx nia nib nii nim nin nio nix nma nmb nmi nmm nmn nmo nna nnb nni nnm nnn nno no- noa nob noi nom non noo nox o-i oaa oab oai oam oan oao oax ob- oba obb obi obm obn obo obx oia oib oii oim oin oio om- oma omb omi omm omn omo omx on- ona onb oni onn ono onx oo- ooa oob ooi oom oon ooo oox ox- oxa oxb oxi oxn oxo oxx xaa xam xan xbx xia xii xin xio xix xma xmi xmm xmo xmx xna xno xoa xoi xom xon xoo xox xxi xxo xxx