a-a a-b a-i aaa aab aag aai aam aao aax ab- aba abb abg abi abm abo abx ag- aga agb agg agi agm ago agx ai- aia aib aig aii aim aio aix ama amb amg ami amm amo amx aoa aob aog aoi aom aoo aox ax- axa axi axm axo axx baa bab bag bai bam bao bax bba bbb bbg bbi bbm bbo bbx bga bgb bgg bgi bgm bgo bgx bi- bia bib big bii bim bio bix bma bmb bmg bmi bmm bmo bmx boa bob bog boi bom boo box bxb bxi bxm bxo bxx gaa gab gag gai gam gao gba gbg gbi gbm gbo gbx gga ggb ggg ggi ggm ggo gia gib gig gii gim gio gma gmb gmg gmi gmm gmo gmx goa gob gog goi gom goo gox gxa ia- iaa iab iag iai iam iao iba ibb ibg ibi ibm ibo ibx iga igb igg igi igm igo iia iib iii iim iio iix im- ima imb img imi imm imo imx io- ioa iob iog ioi iom ioo ixi m-o maa mab mag mai mam mao max mba mbb mbg mbi mbm mbo mbx mga mgb mgi mgm mgo mgx mi- mia mib mig mii mim mio mix mma mmb mmg mmi mmm mmo mmx moa mob mog moi mom moo mox mxa mxi o-i oaa oab oag oai oam oao oax ob- oba obb obg obi obm obo obx oga ogg ogi ogo ogx oia oib oii oim oio om- oma omb omg omi omm omo omx oo- ooa oob oog ooi oom ooo oox ox- oxa oxb oxi oxo oxx xaa xag xam xbx xgi xia xii xio xix xma xmg xmi xmm xmo xmx xoa xog xoi xom xoo xox xxi xxo xxx