a-a a-b a-i a-z aaa aab aai aam aao aax aaz ab- aba abb abi abm abo abx abz ai- aia aib aii aim aio aix aiz ama amb ami amm amo amx amz aoa aob aoi aom aoo aox ax- axa axi axm axo axx az- aza azb azi azm azo azx azz baa bab bai bam bao bax baz bba bbb bbi bbm bbo bbx bi- bia bib bii bim bio bix biz bma bmb bmi bmm bmo bmx bmz boa bob boi bom boo box boz bxb bxi bxm bxo bxx bza bzo bzz ia- iaa iab iai iam iao iaz iba ibb ibi ibm ibo ibx ibz iia iib iii iim iio iix im- ima imb imi imm imo imx imz io- ioa iob ioi iom ioo ixi iza izi izm izo izz m-o maa mab mai mam mao max maz mba mbb mbi mbm mbo mbx mi- mia mib mii mim mio mix miz mma mmb mmi mmm mmo mmx mmz moa mob moi mom moo mox moz mxa mxi mza mzb mzi mzm mzx o-i oaa oab oai oam oao oax ob- oba obb obi obm obo obx oia oib oii oim oio oiz om- oma omb omi omm omo omx omz oo- ooa oob ooi oom ooo oox ox- oxa oxb oxi oxo oxx oza ozm ozo ozz xaa xam xbx xia xii xio xix xma xmi xmm xmo xmx xoa xoi xom xoo xox xxi xxo xxx zaa zab zai zam zao zax zaz zbb zbm zia zib zim zio zix ziz zma zmb zmm zo- zoa zob zoi zom zoo zox zxx zzx zzz