-er -ol b-u bbb bbe bbl bbm bbo bbr bbs bbu be- beb bee bel bem beo ber bes beu blb ble bll blm blo blr bls blu bmb bme bml bmm bmo bmr bms bmu bob boe bol bom boo bor bos bou brb bre brl brm bro brr brs bru bsb bse bsl bsm bso bsr bss bsu bub bue bul bum buo bur bus buu ebb ebe ebl ebm ebo ebr ebs ebu eeb eee eel eem eeo eer ees elb ele ell elm elo elr els elu em- emb eme eml emm emo emr ems emu eo- eob eoe eol eom eoo eor eos eou erb ere erl erm ero err ers eru es- esb ese esl esm eso esr ess esu eu- eub eue eul eur eus lbb lbe lbl lbm lbo lbr lbs lbu leb lee lel lem leo ler les leu llb lle lll llm llo llr lls llu lmb lme lml lmm lmo lmr lms lmu lob loe lol lom loo lor los lou lrb lrm lro lrr lrs lru lsb lse lsl lsm lso lsr lss lsu lub lue lul lum luo lur lus luu m-o m-r mbb mbe mbl mbm mbo mbr mbs mbu meb mee mel mem meo mer mes meu mlb mle mll mlm mlo mlr mls mlu mmb mme mml mmm mmo mmr mms mmu mob moe mol mom moo mor mos mou mrb mre mrl mrm mro mrr mrs mru msb mse msl msm mso msr mss msu mub mue mul mum mur mus muu ob- obb obe obl obm obo obr obs obu oeb oee oel oem oeo oer oes olb ole oll olm olo ols olu om- omb ome oml omm omo omr oms omu oo- oob ool oom ooo oor oos or- orb ore orl orm oro orr ors oru os- osb ose osl osm oso osr oss osu ou- oue oul oum ouo our ous rbb rbe rbl rbm rbo rbr rbs rbu re- reb ree rel rem reo rer res reu rle rll rlm rlo rlr rls rlu rmb rme rml rmm rmo rmr rms rob roe rol rom roo ror ros rou rrb rrl rrm rrr rrs rru rsb rse rsl rsm rso rsr rss rsu rub rue rum ruo rur rus ruu sbb sbe sbl sbm sbo sbr sbs sbu se- seb see sel sem seo ser ses seu slb sle sll slm slo slr sls slu smb sme sml smm smo smr sms smu sob soe sol som soo sor sos sou sr- srb sre srl srm sro srr srs ss- ssb sse ssl ssm sso ssr sss ssu sub sue sul sum suo sur sus suu ubb ube ubl ubo ubr ubs ubu ueb uee uel uem uer ues ulb ule ull ulm ulo ulr uls ulu um- umb ume uml umm umo umr ums umu uob uoe uol uom uoo uor uos ur- urb ure url urm uro urr urs uru usb use usl usm uso usr uss usu uue uum uur uus uuu