a-a a-b a-i aaa aab aag aai aam aao ab- aba abb abg abi abm abo ag- aga agb agg agi agm ago ai- aia aib aig aii aim aio ama amb amg ami amm amo aoa aob aog aoi aom aoo baa bab bag bai bam bao bba bbb bbg bbi bbm bbo bga bgb bgg bgi bgm bgo bi- bia bib big bii bim bio bma bmb bmg bmi bmm bmo boa bob bog boi bom boo gaa gab gag gai gam gao gba gbg gbi gbm gbo gga ggb ggg ggi ggm ggo gia gib gig gii gim gio gma gmb gmg gmi gmm gmo goa gob gog goi gom goo ia- iaa iab iag iai iam iao iba ibb ibg ibi ibm ibo iga igb igg igi igm igo iia iib iii iim iio im- ima imb img imi imm imo io- ioa iob iog ioi iom ioo m-o maa mab mag mai mam mao mba mbb mbg mbi mbm mbo mga mgb mgi mgm mgo mi- mia mib mig mii mim mio mma mmb mmg mmi mmm mmo moa mob mog moi mom moo o-i oaa oab oag oai oam oao ob- oba obb obg obi obm obo oga ogg ogi ogo oia oib oii oim oio om- oma omb omg omi omm omo oo- ooa oob oog ooi oom ooo