-al a-a a-b a-i a-t aaa aab aae aaf aag aai aal aat ab- aba abb abe abf abg abi abl abt aea aeb aee aef aeg aei ael aet af- afa afb afe aff afg afi afl aft ag- aga agb age agf agg agi agl agt ai- aia aib aie aif aig aii ail ait al- ala alb ale alf alg ali all alt at- ata atb ate atf atg ati atl att baa bab bae baf bag bai bal bat bba bbb bbe bbf bbg bbi bbl bbt be- bea beb bee bef beg bei bel bet bfa bfb bfe bff bfg bfi bfl bft bga bgb bge bgf bgg bgi bgl bgt bi- bia bib bie bif big bii bil bit bla blb ble blf blg bli bll blt bta btb bte btf btg bti btl btt eaa eab eae eaf eag eai eal eat eba ebb ebe ebf ebg ebi ebl ebt eea eeb eee eef eeg eel eet ef- efa efb efe eff efg efi efl eft ega egb ege egf egg egi egl egt eia eib eie eif eig eii eil eit ela elb ele elf elg eli ell elt eta etb ete etf etg eti etl ett faa fab fae faf fag fai fal fat fba fbb fbe fbf fbg fbi fbl fbt fea feb fee fef feg fei fel fet ffa ffe fff ffg ffi ffl fft fga fgb fge fgf fgg fgi fgl fgt fia fib fie fif fig fii fil fit fla flb fle flf flg fli fll flt fta ftb fte ftf ftg fti ftl ftt gaa gab gae gaf gag gai gal gat gba gbe gbf gbg gbi gbl gbt ge- gea geb gee gef geg gei gel get gfa gfb gfe gff gfi gfl gft gga ggb ggg ggi ggt gia gib gie gif gig gii gil git gla glb gle glf glg gli gll glt gta gtb gte gtf gtg gti gtl gtt i-f ia- iaa iab iae iaf iag iai ial iat iba ibb ibe ibf ibg ibi ibl ibt ie- iea iee ief ieg iei iel iet ifa ifb ife iff ifg ifi ifl ift iga igb ige igf igg igi igl igt iia iib iie iif iii iil iit il- ila ilb ile ilf ilg ili ill ilt ita itb ite itf itg iti itl itt la- laa lab lae laf lag lai lal lat lba lbb lbe lbf lbg lbi lbl lbt lea leb lee lef leg lei lel let lfa lfb lfe lff lfg lfi lfl lft lga lgb lge lgf lgg lgi lgl lgt lia lib lie lif lig lii lil lit lla llb lle llf llg lli lll llt lta ltb lte ltf ltg lti ltl ltt taa tab tae taf tag tai tal tat tba tbb tbe tbf tbg tbi tbl tbt te- tea teb tee tef teg tei tel tet tfa tfb tfe tff tfg tfi tfl tft tga tgb tge tgf tgg tgi tgl tgt tia tib tie tif tig tii til tit tla tle tlf tlg tli tll tlt tta ttb tte ttf ttg tti ttl ttt