-al -er a-a a-b a-t aaa aab aae aag aal aan aar aat ab- aba abb abe abg abl abn abr abt aea aeb aee aeg ael aen aer aet ag- aga agb age agg agl agn agr agt al- ala alb ale alg all aln alr alt an- ana anb ane ang anl ann anr ant ar- ara arb are arg arl arn arr art at- ata atb ate atg atl atn atr att baa bab bae bag bal ban bar bat bba bbb bbe bbg bbl bbn bbr bbt be- bea beb bee beg bel ben ber bet bga bgb bge bgg bgl bgn bgr bgt bla blb ble blg bll bln blr blt bna bnb bne bng bnl bnn bnr bnt bra brb bre brg brl brn brr brt bta btb bte btg btl btn btr btt eaa eab eae eag eal ean ear eat eba ebb ebe ebg ebl ebn ebr ebt eea eeb eee eeg eel een eer eet ega egb ege egg egl egn egr egt ela elb ele elg ell eln elr elt en- ena enb ene eng enl enn enr ent era erb ere erg erl ern err ert eta etb ete etg etl etn etr ett gaa gab gae gag gal gan gar gat gba gbe gbg gbl gbn gbr gbt ge- gea geb gee geg gel gen ger get gga ggb ggg ggn ggr ggt gla glb gle glg gll gln glr glt gna gnb gne gnl gnn gnr gnt gra grb gre grg grl grn grr grt gta gtb gte gtg gtl gtn gtr gtt la- laa lab lae lag lal lan lar lat lba lbb lbe lbg lbl lbr lbt lea leb lee leg lel len ler let lga lgb lge lgg lgl lgn lgr lgt lla llb lle llg lll lln llr llt lna lnb lne lng lnl lnn lnr lnt lra lrb lrg lrn lrr lrt lta ltb lte ltg ltl ltr ltt naa nab nae nag nal nan nar nat nba nbb nbe nbg nbl nbn nbr nbt ne- nea neb nee neg nel nen ner net nga ngb nge ngg ngl ngn ngt nla nlb nle nlg nll nln nlr nlt nna nnb nne nng nnl nnn nnt nra nrb nre nrg nrl nrn nrr nrt nta ntb nte ntg ntn ntr ntt ra- raa rab rae rag ral ran rar rat rba rbb rbe rbg rbl rbn rbr rbt re- rea reb ree reg rel ren rer ret rga rgb rge rgg rgn rgr rgt rla rle rlg rll rln rlr rlt rna rnb rng rnn rnr rnt rra rrb rrg rrl rrn rrr rrt rta rtb rte rtg rtl rtn rtr rtt taa tab tae tag tal tan tar tat tba tbb tbe tbg tbl tbn tbr tbt te- tea teb tee teg tel ten ter tet tga tgb tge tgg tgl tgn tgr tgt tla tle tlg tll tln tlr tlt tna tnb tne tng tnl tnn tnr tnt tra trb tre trg trl trn trr trt tta ttb tte ttg ttl ttn ttr ttt