-al a-a a-b a-i a-t aaa aab aae aag aai aal aat ab- aba abb abe abg abi abl abt aea aeb aee aeg aei ael aet ag- aga agb age agg agi agl agt ai- aia aib aie aig aii ail ait al- ala alb ale alg ali all alt at- ata atb ate atg ati atl att baa bab bae bag bai bal bat bba bbb bbe bbg bbi bbl bbt be- bea beb bee beg bei bel bet bga bgb bge bgg bgi bgl bgt bi- bia bib bie big bii bil bit bla blb ble blg bli bll blt bta btb bte btg bti btl btt eaa eab eae eag eai eal eat eba ebb ebe ebg ebi ebl ebt eea eeb eee eeg eel eet ega egb ege egg egi egl egt eia eib eie eig eii eil eit ela elb ele elg eli ell elt eta etb ete etg eti etl ett gaa gab gae gag gai gal gat gba gbe gbg gbi gbl gbt ge- gea geb gee geg gei gel get gga ggb ggg ggi ggt gia gib gie gig gii gil git gla glb gle glg gli gll glt gta gtb gte gtg gti gtl gtt ia- iaa iab iae iag iai ial iat iba ibb ibe ibg ibi ibl ibt ie- iea iee ieg iei iel iet iga igb ige igg igi igl igt iia iib iie iii iil iit il- ila ilb ile ilg ili ill ilt ita itb ite itg iti itl itt la- laa lab lae lag lai lal lat lba lbb lbe lbg lbi lbl lbt lea leb lee leg lei lel let lga lgb lge lgg lgi lgl lgt lia lib lie lig lii lil lit lla llb lle llg lli lll llt lta ltb lte ltg lti ltl ltt taa tab tae tag tai tal tat tba tbb tbe tbg tbi tbl tbt te- tea teb tee teg tei tel tet tga tgb tge tgg tgi tgl tgt tia tib tie tig tii til tit tla tle tlg tli tll tlt tta ttb tte ttg tti ttl ttt