-al a-a a-b a-t aaa aab aae aag aal aan aas aat ab- aba abb abe abg abl abn abs abt aea aeb aee aeg ael aen aes aet ag- aga agb age agg agl agn ags agt al- ala alb ale alg all aln als alt an- ana anb ane ang anl ann ans ant as- asa asb ase asg asl asn ass ast at- ata atb ate atg atl atn ats att baa bab bae bag bal ban bas bat bba bbb bbe bbg bbl bbn bbs bbt be- bea beb bee beg bel ben bes bet bga bgb bge bgg bgl bgn bgs bgt bla blb ble blg bll bln bls blt bna bnb bne bng bnl bnn bns bnt bsa bsb bse bsg bsl bsn bss bst bta btb bte btg btl btn bts btt eaa eab eae eag eal ean eas eat eba ebb ebe ebg ebl ebn ebs ebt eea eeb eee eeg eel een ees eet ega egb ege egg egl egn egs egt ela elb ele elg ell eln els elt en- ena enb ene eng enl enn ens ent es- esa esb ese esg esl esn ess est eta etb ete etg etl etn ets ett gaa gab gae gag gal gan gas gat gba gbe gbg gbl gbn gbs gbt ge- gea geb gee geg gel gen ges get gga ggb ggg ggn ggs ggt gla glb gle glg gll gln gls glt gna gnb gne gnl gnn gns gnt gsa gsb gse gsg gsl gsn gss gst gta gtb gte gtg gtl gtn gts gtt la- laa lab lae lag lal lan las lat lba lbb lbe lbg lbl lbs lbt lea leb lee leg lel len les let lga lgb lge lgg lgl lgn lgs lgt lla llb lle llg lll lln lls llt lna lnb lne lng lnl lnn lns lnt lsa lsb lse lsg lsl lsn lss lst lta ltb lte ltg ltl lts ltt naa nab nae nag nal nan nas nat nba nbb nbe nbg nbl nbn nbs nbt ne- nea neb nee neg nel nen nes net nga ngb nge ngg ngl ngn ngs ngt nla nlb nle nlg nll nln nls nlt nna nnb nne nng nnl nnn nns nnt nsa nsb nse nsg nsl nsn nss nst nta ntb nte ntg ntn nts ntt saa sab sae sag sal san sas sat sba sbb sbe sbg sbl sbn sbs sbt se- sea seb see seg sel sen ses set sga sgb sge sgg sgl sgn sgs sgt sla slb sle slg sll sln sls slt sna snb sne sng snl snn sns snt ss- ssa ssb sse ssg ssl ssn sss sst sta stb ste stg stl stn sts stt taa tab tae tag tal tan tas tat tba tbb tbe tbg tbl tbn tbs tbt te- tea teb tee teg tel ten tes tet tga tgb tge tgg tgl tgn tgs tgt tla tle tlg tll tln tls tlt tna tnb tne tng tnl tnn tns tnt tsa tsb tse tsg tsl tsn tss tst tta ttb tte ttg ttl ttn tts ttt