-er -ol bbb bbe bbl bbm bbo bbr bbs bbt be- beb bee bel bem beo ber bes bet blb ble bll blm blo blr bls blt bmb bme bml bmm bmo bmr bms bmt bob boe bol bom boo bor bos bot brb bre brl brm bro brr brs brt bsb bse bsl bsm bso bsr bss bst btb bte btl btm bto btr bts btt ebb ebe ebl ebm ebo ebr ebs ebt eeb eee eel eem eeo eer ees eet elb ele ell elm elo elr els elt em- emb eme eml emm emo emr ems emt eo- eob eoe eol eom eoo eor eos eot erb ere erl erm ero err ers ert es- esb ese esl esm eso esr ess est etb ete etl etm eto etr ets ett lbb lbe lbl lbm lbo lbr lbs lbt leb lee lel lem leo ler les let llb lle lll llm llo llr lls llt lmb lme lml lmm lmo lmr lms lmt lob loe lol lom loo lor los lot lrb lrm lro lrr lrs lrt lsb lse lsl lsm lso lsr lss lst ltb lte ltl ltm lto ltr lts ltt m-o m-r mbb mbe mbl mbm mbo mbr mbs mbt meb mee mel mem meo mer mes met mlb mle mll mlm mlo mlr mls mlt mmb mme mml mmm mmo mmr mms mmt mob moe mol mom moo mor mos mot mrb mre mrl mrm mro mrr mrs mrt msb mse msl msm mso msr mss mst mtb mte mtl mtm mto mtr mts mtt ob- obb obe obl obm obo obr obs obt oeb oee oel oem oeo oer oes oet olb ole oll olm olo ols olt om- omb ome oml omm omo omr oms omt oo- oob ool oom ooo oor oos oot or- orb ore orl orm oro orr ors ort os- osb ose osl osm oso osr oss ost ot- otb ote otl otm oto otr ots ott rbb rbe rbl rbm rbo rbr rbs rbt re- reb ree rel rem reo rer res ret rle rll rlm rlo rlr rls rlt rmb rme rml rmm rmo rmr rms rmt rob roe rol rom roo ror ros rot rrb rrl rrm rrr rrs rrt rsb rse rsl rsm rso rsr rss rst rtb rte rtl rtm rto rtr rts rtt sbb sbe sbl sbm sbo sbr sbs sbt se- seb see sel sem seo ser ses set slb sle sll slm slo slr sls slt smb sme sml smm smo smr sms smt sob soe sol som soo sor sos sot sr- srb sre srl srm sro srr srs srt ss- ssb sse ssl ssm sso ssr sss sst stb ste stl stm sto str sts stt tbb tbe tbl tbm tbo tbr tbs tbt te- teb tee tel tem teo ter tes tet tle tll tlm tlo tlr tls tlt tmb tme tml tmm tmo tmr tms tmt to- tob toe tol tom too tor tos tot trb tre trl trm tro trr trs trt tsb tse tsl tsm tso tsr tss tst ttb tte ttl ttm tto ttr tts ttt