bbb bbe bbg bbl bbs bbt be- beb bee beg bel bes bet bgb bge bgg bgl bgs bgt blb ble blg bll bls blt bsb bse bsg bsl bss bst btb bte btg btl bts btt ebb ebe ebg ebl ebs ebt eeb eee eeg eel ees eet egb ege egg egl egs egt elb ele elg ell els elt es- esb ese esg esl ess est etb ete etg etl ets ett gbe gbg gbl gbs gbt ge- geb gee geg gel ges get ggb ggg ggs ggt glb gle glg gll gls glt gsb gse gsg gsl gss gst gtb gte gtg gtl gts gtt lbb lbe lbg lbl lbs lbt leb lee leg lel les let lgb lge lgg lgl lgs lgt llb lle llg lll lls llt lsb lse lsg lsl lss lst ltb lte ltg ltl lts ltt sbb sbe sbg sbl sbs sbt se- seb see seg sel ses set sgb sge sgg sgl sgs sgt slb sle slg sll sls slt ss- ssb sse ssg ssl sss sst stb ste stg stl sts stt tbb tbe tbg tbl tbs tbt te- teb tee teg tel tes tet tgb tge tgg tgl tgs tgt tle tlg tll tls tlt tsb tse tsg tsl tss tst ttb tte ttg ttl tts ttt