-al -er a-a a-b a-i a-t aaa aab aae aag aai aal aan aar aat ab- aba abb abe abg abi abl abn abr abt aea aeb aee aeg aei ael aen aer aet ag- aga agb age agg agi agl agn agr agt ai- aia aib aie aig aii ail ain air ait al- ala alb ale alg ali all aln alr alt an- ana anb ane ang ani anl ann anr ant ar- ara arb are arg ari arl arn arr art at- ata atb ate atg ati atl atn atr att baa bab bae bag bai bal ban bar bat bba bbb bbe bbg bbi bbl bbn bbr bbt be- bea beb bee beg bei bel ben ber bet bga bgb bge bgg bgi bgl bgn bgr bgt bi- bia bib bie big bii bil bin bir bit bla blb ble blg bli bll bln blr blt bna bnb bne bng bni bnl bnn bnr bnt bra brb bre brg bri brl brn brr brt bta btb bte btg bti btl btn btr btt eaa eab eae eag eai eal ean ear eat eba ebb ebe ebg ebi ebl ebn ebr ebt eea eeb eee eeg eel een eer eet ega egb ege egg egi egl egn egr egt eia eib eie eig eii eil ein eir eit ela elb ele elg eli ell eln elr elt en- ena enb ene eng eni enl enn enr ent era erb ere erg eri erl ern err ert eta etb ete etg eti etl etn etr ett gaa gab gae gag gai gal gan gar gat gba gbe gbg gbi gbl gbn gbr gbt ge- gea geb gee geg gei gel gen ger get gga ggb ggg ggi ggn ggr ggt gia gib gie gig gii gil gin gir git gla glb gle glg gli gll gln glr glt gna gnb gne gni gnl gnn gnr gnt gra grb gre grg gri grl grn grr grt gta gtb gte gtg gti gtl gtn gtr gtt ia- iaa iab iae iag iai ial ian iar iat iba ibb ibe ibg ibi ibl ibn ibr ibt ie- iea iee ieg iei iel ien ier iet iga igb ige igg igi igl ign igr igt iia iib iie iii iil iin iir iit il- ila ilb ile ilg ili ill iln ilr ilt in- ina inb ine ing ini inl inn inr int ir- ira irb ire irg iri irl irn irr irt ita itb ite itg iti itl itn itt la- laa lab lae lag lai lal lan lar lat lba lbb lbe lbg lbi lbl lbr lbt lea leb lee leg lei lel len ler let lga lgb lge lgg lgi lgl lgn lgr lgt lia lib lie lig lii lil lin lir lit lla llb lle llg lli lll lln llr llt lna lnb lne lng lni lnl lnn lnr lnt lra lrb lrg lri lrn lrr lrt lta ltb lte ltg lti ltl ltr ltt n-i naa nab nae nag nai nal nan nar nat nba nbb nbe nbg nbi nbl nbn nbr nbt ne- nea neb nee neg nei nel nen ner net nga ngb nge ngg ngi ngl ngn ngt nia nib nie nig nii nil nin nir nit nla nlb nle nlg nli nll nln nlr nlt nna nnb nne nng nni nnl nnn nnt nra nrb nre nrg nri nrl nrn nrr nrt nta ntb nte ntg nti ntn ntr ntt ra- raa rab rae rag rai ral ran rar rat rba rbb rbe rbg rbi rbl rbn rbr rbt re- rea reb ree reg rei rel ren rer ret rga rgb rge rgg rgi rgn rgr rgt ria rib rie rig rii ril rin rir rit rla rle rlg rli rll rln rlr rlt rna rnb rng rni rnn rnr rnt rra rrb rrg rri rrl rrn rrr rrt rta rtb rte rtg rti rtl rtn rtr rtt taa tab tae tag tai tal tan tar tat tba tbb tbe tbg tbi tbl tbn tbr tbt te- tea teb tee teg tei tel ten ter tet tga tgb tge tgg tgi tgl tgn tgr tgt tia tib tie tig tii til tin tir tit tla tle tlg tli tll tln tlr tlt tna tnb tne tng tni tnl tnn tnr tnt tra trb tre trg tri trl trn trr trt tta ttb tte ttg tti ttl ttn ttr ttt