-al a-a a-b a-t aaa aab aae aag aal aas aat ab- aba abb abe abg abl abs abt aea aeb aee aeg ael aes aet ag- aga agb age agg agl ags agt al- ala alb ale alg all als alt as- asa asb ase asg asl ass ast at- ata atb ate atg atl ats att baa bab bae bag bal bas bat bba bbb bbe bbg bbl bbs bbt be- bea beb bee beg bel bes bet bga bgb bge bgg bgl bgs bgt bla blb ble blg bll bls blt bsa bsb bse bsg bsl bss bst bta btb bte btg btl bts btt eaa eab eae eag eal eas eat eba ebb ebe ebg ebl ebs ebt eea eeb eee eeg eel ees eet ega egb ege egg egl egs egt ela elb ele elg ell els elt es- esa esb ese esg esl ess est eta etb ete etg etl ets ett gaa gab gae gag gal gas gat gba gbe gbg gbl gbs gbt ge- gea geb gee geg gel ges get gga ggb ggg ggs ggt gla glb gle glg gll gls glt gsa gsb gse gsg gsl gss gst gta gtb gte gtg gtl gts gtt la- laa lab lae lag lal las lat lba lbb lbe lbg lbl lbs lbt lea leb lee leg lel les let lga lgb lge lgg lgl lgs lgt lla llb lle llg lll lls llt lsa lsb lse lsg lsl lss lst lta ltb lte ltg ltl lts ltt saa sab sae sag sal sas sat sba sbb sbe sbg sbl sbs sbt se- sea seb see seg sel ses set sga sgb sge sgg sgl sgs sgt sla slb sle slg sll sls slt ss- ssa ssb sse ssg ssl sss sst sta stb ste stg stl sts stt taa tab tae tag tal tas tat tba tbb tbe tbg tbl tbs tbt te- tea teb tee teg tel tes tet tga tgb tge tgg tgl tgs tgt tla tle tlg tll tls tlt tsa tsb tse tsg tsl tss tst tta ttb tte ttg ttl tts ttt