-ol bbb bbg bbl bbn bbo bbr bbs bbt bgb bgg bgl bgn bgo bgr bgs bgt blb blg bll bln blo blr bls blt bnb bng bnl bnn bno bnr bns bnt bob bog bol bon boo bor bos bot brb brg brl brn bro brr brs brt bsb bsg bsl bsn bso bsr bss bst btb btg btl btn bto btr bts btt gbg gbl gbn gbo gbr gbs gbt ggb ggg ggn ggo ggr ggs ggt glb glg gll gln glo glr gls glt gnb gnl gnn gno gnr gns gnt gob gog gol gon goo gor gos got grb grg grl grn gro grr grs grt gsb gsg gsl gsn gso gsr gss gst gtb gtg gtl gtn gto gtr gts gtt lbb lbg lbl lbo lbr lbs lbt lgb lgg lgl lgn lgo lgr lgs lgt llb llg lll lln llo llr lls llt lnb lng lnl lnn lno lnr lns lnt lob log lol lon loo lor los lot lrb lrg lrn lro lrr lrs lrt lsb lsg lsl lsn lso lsr lss lst ltb ltg ltl lto ltr lts ltt nbb nbg nbl nbn nbo nbr nbs nbt ngb ngg ngl ngn ngo ngs ngt nlb nlg nll nln nlo nlr nls nlt nnb nng nnl nnn nno nns nnt no- nob nog nol non noo nor nos not nrb nrg nrl nrn nro nrr nrs nrt nsb nsg nsl nsn nso nsr nss nst ntb ntg ntn nto ntr nts ntt ob- obb obg obl obn obo obr obs obt ogg ogl ogn ogo ogs ogt olb olg oll oln olo ols olt on- onb ong onl onn ono onr ons ont oo- oob oog ool oon ooo oor oos oot or- orb org orl orn oro orr ors ort os- osb osg osl osn oso osr oss ost ot- otb otg otl otn oto otr ots ott rbb rbg rbl rbn rbo rbr rbs rbt rgb rgg rgn rgo rgr rgs rgt rlg rll rln rlo rlr rls rlt rnb rng rnn rno rnr rns rnt rob rog rol ron roo ror ros rot rrb rrg rrl rrn rrr rrs rrt rsb rsg rsl rsn rso rsr rss rst rtb rtg rtl rtn rto rtr rts rtt sbb sbg sbl sbn sbo sbr sbs sbt sgb sgg sgl sgn sgo sgr sgs sgt slb slg sll sln slo slr sls slt snb sng snl snn sno snr sns snt sob sog sol son soo sor sos sot sr- srb srg srl srn sro srr srs srt ss- ssb ssg ssl ssn sso ssr sss sst stb stg stl stn sto str sts stt tbb tbg tbl tbn tbo tbr tbs tbt tgb tgg tgl tgn tgo tgr tgs tgt tlg tll tln tlo tlr tls tlt tnb tng tnl tnn tno tnr tns tnt to- tob tog tol ton too tor tos tot trb trg trl trn tro trr trs trt tsb tsg tsl tsn tso tsr tss tst ttb ttg ttl ttn tto ttr tts ttt