-ol b-u bbb bbg bbl bbo bbs bbt bbu bgb bgg bgl bgo bgs bgt bgu bgv blb blg bll blo bls blt blu blv bob bog bol boo bos bot bou bov bsb bsg bsl bso bss bst bsu bsv btb btg btl bto bts btt btu btv bub bug bul buo bus but buu bvb bvg bvl bvo bvs bvt bvu bvv gbg gbl gbo gbs gbt gbu gbv ggb ggg ggo ggs ggt ggu ggv glb glg gll glo gls glt glu glv gob gog gol goo gos got gou gov gsb gsg gsl gso gss gst gsu gsv gtb gtg gtl gto gts gtt gtu gtv gu- gub gug gul guo gus gut guu guv gvb gvg gvl gvo gvs gvt gvu lbb lbg lbl lbo lbs lbt lbu lbv lgb lgg lgl lgo lgs lgt lgu lgv llb llg lll llo lls llt llu llv lob log lol loo los lot lou lov lsb lsg lsl lso lss lst lsu lsv ltb ltg ltl lto lts ltt ltu ltv lub lug lul luo lus lut luu luv lvb lvg lvl lvs lvt lvv ob- obb obg obl obo obs obt obu obv ogg ogl ogo ogs ogt olb olg oll olo ols olt olu oo- oob oog ool ooo oos oot oov os- osb osg osl oso oss ost osu osv ot- otb otg otl oto ots ott otu otv ou- oul ouo ous out ov- ovb ovl ovo ovs ovv sbb sbg sbl sbo sbs sbt sbu sbv sgb sgg sgl sgo sgs sgt sgu sgv slb slg sll slo sls slt slu slv sob sog sol soo sos sot sou sov ss- ssb ssg ssl sso sss sst ssu ssv stb stg stl sto sts stt stu stv sub sug sul suo sus sut suu suv svb svg svl svo svs svt svu svv tbb tbg tbl tbo tbs tbt tbu tbv tgb tgg tgl tgo tgs tgt tgu tgv tlg tll tlo tls tlt tlu tlv to- tob tog tol too tos tot tou tov tsb tsg tsl tso tss tst tsu tsv ttb ttg ttl tto tts ttt ttu ttv tub tug tul tuo tus tut tuu tuv tvb tvg tvl tvo tvs tvt tvu ubb ubg ubl ubo ubs ubt ubu ubv ugb ugg ugl ugo ugs ugt ugu ulb ulg ull ulo uls ult ulu ulv uob uog uol uoo uos uot usb usg usl uso uss ust usu usv utb utl uto uts utt utu utv uug uus uut uuu uvb uvl uvo uvs uvu uvv vbg vbl vbo vbs vbv vgg vgl vgo vgs vgt vgu vl- vlb vll vlo vls vlt vlv vob vog vol voo vos vot vou vov vsb vsg vsl vso vss vst vsu vsv vtb vtg vtl vto vts vtt vtu vtv vug vul vus vut vuv vvb vvg vvo vvs vvt vvv