-al a-a a-b a-i a-t aaa aab aae aaf aag aai aal aan aat ab- aba abb abe abf abg abi abl abn abt aea aeb aee aef aeg aei ael aen aet af- afa afb afe aff afg afi afl afn aft ag- aga agb age agf agg agi agl agn agt ai- aia aib aie aif aig aii ail ain ait al- ala alb ale alf alg ali all aln alt an- ana anb ane anf ang ani anl ann ant at- ata atb ate atf atg ati atl atn att baa bab bae baf bag bai bal ban bat bba bbb bbe bbf bbg bbi bbl bbn bbt be- bea beb bee bef beg bei bel ben bet bfa bfb bfe bff bfg bfi bfl bfn bft bga bgb bge bgf bgg bgi bgl bgn bgt bi- bia bib bie bif big bii bil bin bit bla blb ble blf blg bli bll bln blt bna bnb bne bnf bng bni bnl bnn bnt bta btb bte btf btg bti btl btn btt eaa eab eae eaf eag eai eal ean eat eba ebb ebe ebf ebg ebi ebl ebn ebt eea eeb eee eef eeg eel een eet ef- efa efb efe eff efg efi efl eft ega egb ege egf egg egi egl egn egt eia eib eie eif eig eii eil ein eit ela elb ele elf elg eli ell eln elt en- ena enb ene enf eng eni enl enn ent eta etb ete etf etg eti etl etn ett faa fab fae faf fag fai fal fan fat fba fbb fbe fbf fbg fbi fbl fbn fbt fea feb fee fef feg fei fel fen fet ffa ffe fff ffg ffi ffl ffn fft fga fgb fge fgf fgg fgi fgl fgn fgt fia fib fie fif fig fii fil fin fit fla flb fle flf flg fli fll fln flt fna fnb fne fnf fng fni fnl fnn fnt fta ftb fte ftf ftg fti ftl ftn ftt gaa gab gae gaf gag gai gal gan gat gba gbe gbf gbg gbi gbl gbn gbt ge- gea geb gee gef geg gei gel gen get gfa gfb gfe gff gfi gfl gft gga ggb ggg ggi ggn ggt gia gib gie gif gig gii gil gin git gla glb gle glf glg gli gll gln glt gna gnb gne gnf gni gnl gnn gnt gta gtb gte gtf gtg gti gtl gtn gtt i-f ia- iaa iab iae iaf iag iai ial ian iat iba ibb ibe ibf ibg ibi ibl ibn ibt ie- iea iee ief ieg iei iel ien iet ifa ifb ife iff ifg ifi ifl ifn ift iga igb ige igf igg igi igl ign igt iia iib iie iif iii iil iin iit il- ila ilb ile ilf ilg ili ill iln ilt in- ina inb ine inf ing ini inl inn int ita itb ite itf itg iti itl itn itt la- laa lab lae laf lag lai lal lan lat lba lbb lbe lbf lbg lbi lbl lbt lea leb lee lef leg lei lel len let lfa lfb lfe lff lfg lfi lfl lfn lft lga lgb lge lgf lgg lgi lgl lgn lgt lia lib lie lif lig lii lil lin lit lla llb lle llf llg lli lll lln llt lna lnb lne lng lni lnl lnn lnt lta ltb lte ltf ltg lti ltl ltt n-i naa nab nae naf nag nai nal nan nat nba nbb nbe nbf nbg nbi nbl nbn nbt ne- nea neb nee nef neg nei nel nen net nfa nfb nfe nff nfi nfl nfn nft nga ngb nge ngf ngg ngi ngl ngn ngt nia nib nie nif nig nii nil nin nit nla nlb nle nlf nlg nli nll nln nlt nna nnb nne nnf nng nni nnl nnn nnt nta ntb nte ntf ntg nti ntn ntt taa tab tae taf tag tai tal tan tat tba tbb tbe tbf tbg tbi tbl tbn tbt te- tea teb tee tef teg tei tel ten tet tfa tfb tfe tff tfg tfi tfl tfn tft tga tgb tge tgf tgg tgi tgl tgn tgt tia tib tie tif tig tii til tin tit tla tle tlf tlg tli tll tln tlt tna tnb tne tnf tng tni tnl tnn tnt tta ttb tte ttf ttg tti ttl ttn ttt