-al -ol a-a a-b a-i a-t aaa aab aae aaf aag aai aal aao aat ab- aba abb abe abf abg abi abl abo abt aea aeb aee aef aeg aei ael aeo aet af- afa afb afe aff afg afi afl afo aft ag- aga agb age agf agg agi agl ago agt ai- aia aib aie aif aig aii ail aio ait al- ala alb ale alf alg ali all alo alt aoa aob aoe aof aog aoi aol aoo aot at- ata atb ate atf atg ati atl ato att baa bab bae baf bag bai bal bao bat bba bbb bbe bbf bbg bbi bbl bbo bbt be- bea beb bee bef beg bei bel beo bet bfa bfb bfe bff bfg bfi bfl bfo bft bga bgb bge bgf bgg bgi bgl bgo bgt bi- bia bib bie bif big bii bil bio bit bla blb ble blf blg bli bll blo blt boa bob boe bof bog boi bol boo bot bta btb bte btf btg bti btl bto btt eaa eab eae eaf eag eai eal eao eat eba ebb ebe ebf ebg ebi ebl ebo ebt eea eeb eee eef eeg eel eeo eet ef- efa efb efe eff efg efi efl efo eft ega egb ege egf egg egi egl ego egt eia eib eie eif eig eii eil eio eit ela elb ele elf elg eli ell elo elt eo- eoa eob eoe eof eog eoi eol eoo eot eta etb ete etf etg eti etl eto ett faa fab fae faf fag fai fal fao fat fba fbb fbe fbf fbg fbi fbl fbo fbt fea feb fee fef feg fei fel feo fet ffa ffe fff ffg ffi ffl ffo fft fga fgb fge fgf fgg fgi fgl fgt fia fib fie fif fig fii fil fit fla flb fle flf flg fli fll flo flt foa fob foe fof fog foi fol foo fot fta ftb fte ftf ftg fti ftl fto ftt gaa gab gae gaf gag gai gal gao gat gba gbe gbf gbg gbi gbl gbo gbt ge- gea geb gee gef geg gei gel geo get gfa gfb gfe gff gfi gfl gfo gft gga ggb ggg ggi ggo ggt gia gib gie gif gig gii gil gio git gla glb gle glf glg gli gll glo glt goa gob goe gof gog goi gol goo got gta gtb gte gtf gtg gti gtl gto gtt i-f ia- iaa iab iae iaf iag iai ial iao iat iba ibb ibe ibf ibg ibi ibl ibo ibt ie- iea iee ief ieg iei iel iet ifa ifb ife iff ifg ifi ifl ifo ift iga igb ige igf igg igi igl igo igt iia iib iie iif iii iil iio iit il- ila ilb ile ilf ilg ili ill ilo ilt io- ioa iob ioe iof iog ioi iol ioo iot ita itb ite itf itg iti itl ito itt la- laa lab lae laf lag lai lal lao lat lba lbb lbe lbf lbg lbi lbl lbo lbt lea leb lee lef leg lei lel leo let lfa lfb lfe lff lfg lfi lfl lfo lft lga lgb lge lgf lgg lgi lgl lgo lgt lia lib lie lif lig lii lil lio lit lla llb lle llf llg lli lll llo llt loa lob loe lof log loi lol loo lot lta ltb lte ltf ltg lti ltl lto ltt o-i oaa oab oae oaf oag oai oal oao oat ob- oba obb obe obf obg obi obl obo obt oea oeb oee oef oeg oei oel oeo oet of- ofa ofb ofe off ofg ofi ofl ofo oft oga oge ogf ogg ogi ogl ogo ogt oia oib oie oif oii oil oio oit ola olb ole olf olg oli oll olo olt oo- ooa oob oof oog ooi ool ooo oot ot- ota otb ote otf otg oti otl oto ott taa tab tae taf tag tai tal tao tat tba tbb tbe tbf tbg tbi tbl tbo tbt te- tea teb tee tef teg tei tel teo tet tfa tfb tfe tff tfg tfi tfl tfo tft tga tgb tge tgf tgg tgi tgl tgo tgt tia tib tie tif tig tii til tio tit tla tle tlf tlg tli tll tlo tlt to- toa tob toe tof tog toi tol too tot tta ttb tte ttf ttg tti ttl tto ttt