-al a-a a-b a-i a-t aaa aab aae aag aai aak aal aat ab- aba abb abe abg abi abk abl abt aea aeb aee aeg aei aek ael aet ag- aga agb age agg agi agk agl agt ai- aia aib aie aig aii aik ail ait aka akb ake akg aki akk akl al- ala alb ale alg ali alk all alt at- ata atb ate atg ati atl att baa bab bae bag bai bak bal bat bba bbb bbe bbg bbi bbk bbl bbt be- bea beb bee beg bei bek bel bet bga bgb bge bgg bgi bgk bgl bgt bi- bia bib bie big bii bik bil bit bka bkb bke bkg bkk bkl bkt bla blb ble blg bli blk bll blt bta btb bte btg bti btk btl btt eaa eab eae eag eai eak eal eat eba ebb ebe ebg ebi ebk ebl ebt eea eeb eee eeg eek eel eet ega egb ege egg egi egl egt eia eib eie eig eii eik eil eit eka ekb eke ekg eki ekl ekt ela elb ele elg eli elk ell elt eta etb ete etg eti etk etl ett gaa gab gae gag gai gak gal gat gba gbe gbg gbi gbk gbl gbt ge- gea geb gee geg gei gek gel get gga ggb ggg ggi ggt gia gib gie gig gii gik gil git gka gkb gkt gla glb gle glg gli glk gll glt gta gtb gte gtg gti gtk gtl gtt ia- iaa iab iae iag iai ial iat iba ibb ibe ibg ibi ibk ibl ibt ie- iea iee ieg iei iek iel iet iga igb ige igg igi igk igl igt iia iib iie iii iil iit ika ikb ike iki ikk ikl ikt il- ila ilb ile ilg ili ilk ill ilt ita itb ite itg iti itk itl itt k-t ka- kaa kab kae kag kai kak kal kat kba kbb kbe kbi kbk kbl ke- kea keb kee keg kei kek kel ket kga kgb kgi kgl kia kib kie kig kii kik kil kit kkb kke kki kkk kkl kkt kl- kla klb klg kli klt kta ktb kte ktg ktk ktl ktt la- laa lab lae lag lai lak lal lat lba lbb lbe lbg lbi lbk lbl lbt lea leb lee leg lei lek lel let lga lgb lge lgg lgi lgk lgl lgt lia lib lie lig lii lik lil lit lka lkb lkg lkl lkt lla llb lle llg lli llk lll llt lta ltb lte ltg lti ltk ltl ltt taa tab tae tag tai tak tal tat tba tbb tbe tbg tbi tbk tbl tbt te- tea teb tee teg tei tek tel tet tga tgb tge tgg tgi tgk tgl tgt tia tib tie tig tii tik til tit tka tkb tke tkg tkk tkl tkt tla tle tlg tli tlk tll tlt tta ttb tte ttg tti ttk ttl ttt