-ol bbb bbe bbg bbl bbo bbs bbt be- beb bee beg bel beo bes bet bgb bge bgg bgl bgo bgs bgt blb ble blg bll blo bls blt bob boe bog bol boo bos bot bsb bse bsg bsl bso bss bst btb bte btg btl bto bts btt ebb ebe ebg ebl ebo ebs ebt eeb eee eeg eel eeo ees eet egb ege egg egl ego egs egt elb ele elg ell elo els elt eo- eob eoe eog eol eoo eos eot es- esb ese esg esl eso ess est etb ete etg etl eto ets ett gbe gbg gbl gbo gbs gbt ge- geb gee geg gel geo ges get ggb ggg ggo ggs ggt glb gle glg gll glo gls glt gob goe gog gol goo gos got gsb gse gsg gsl gso gss gst gtb gte gtg gtl gto gts gtt lbb lbe lbg lbl lbo lbs lbt leb lee leg lel leo les let lgb lge lgg lgl lgo lgs lgt llb lle llg lll llo lls llt lob loe log lol loo los lot lsb lse lsg lsl lso lss lst ltb lte ltg ltl lto lts ltt ob- obb obe obg obl obo obs obt oeb oee oeg oel oeo oes oet oge ogg ogl ogo ogs ogt olb ole olg oll olo ols olt oo- oob oog ool ooo oos oot os- osb ose osg osl oso oss ost ot- otb ote otg otl oto ots ott sbb sbe sbg sbl sbo sbs sbt se- seb see seg sel seo ses set sgb sge sgg sgl sgo sgs sgt slb sle slg sll slo sls slt sob soe sog sol soo sos sot ss- ssb sse ssg ssl sso sss sst stb ste stg stl sto sts stt tbb tbe tbg tbl tbo tbs tbt te- teb tee teg tel teo tes tet tgb tge tgg tgl tgo tgs tgt tle tlg tll tlo tls tlt to- tob toe tog tol too tos tot tsb tse tsg tsl tso tss tst ttb tte ttg ttl tto tts ttt