-al -ol a-a a-b a-i a-t aaa aab aag aai aal aao aat ab- aba abb abg abi abl abo abt ag- aga agb agg agi agl ago agt ai- aia aib aig aii ail aio ait al- ala alb alg ali all alo alt aoa aob aog aoi aol aoo aot at- ata atb atg ati atl ato att baa bab bag bai bal bao bat bba bbb bbg bbi bbl bbo bbt bga bgb bgg bgi bgl bgo bgt bi- bia bib big bii bil bio bit bla blb blg bli bll blo blt boa bob bog boi bol boo bot bta btb btg bti btl bto btt gaa gab gag gai gal gao gat gba gbg gbi gbl gbo gbt gga ggb ggg ggi ggo ggt gia gib gig gii gil gio git gla glb glg gli gll glo glt goa gob gog goi gol goo got gta gtb gtg gti gtl gto gtt ia- iaa iab iag iai ial iao iat iba ibb ibg ibi ibl ibo ibt iga igb igg igi igl igo igt iia iib iii iil iio iit il- ila ilb ilg ili ill ilo ilt io- ioa iob iog ioi iol ioo iot ita itb itg iti itl ito itt la- laa lab lag lai lal lao lat lba lbb lbg lbi lbl lbo lbt lga lgb lgg lgi lgl lgo lgt lia lib lig lii lil lio lit lla llb llg lli lll llo llt loa lob log loi lol loo lot lta ltb ltg lti ltl lto ltt o-i oaa oab oag oai oal oao oat ob- oba obb obg obi obl obo obt oga ogg ogi ogl ogo ogt oia oib oii oil oio oit ola olb olg oli oll olo olt oo- ooa oob oog ooi ool ooo oot ot- ota otb otg oti otl oto ott taa tab tag tai tal tao tat tba tbb tbg tbi tbl tbo tbt tga tgb tgg tgi tgl tgo tgt tia tib tig tii til tio tit tla tlg tli tll tlo tlt to- toa tob tog toi tol too tot tta ttb ttg tti ttl tto ttt