-er -ol bbb bbd bbe bbl bbm bbo bbr bbs bdb bdd bde bdl bdm bdo bdr bds be- beb bed bee bel bem beo ber bes blb bld ble bll blm blo blr bls bmb bmd bme bml bmm bmo bmr bms bob bod boe bol bom boo bor bos brb brd bre brl brm bro brr brs bsb bsd bse bsl bsm bso bsr bss dbb dbd dbe dbl dbm dbo dbr dbs ddb ddd dde ddl ddm ddo ddr dds de- deb ded dee del dem deo der des dl- dlb dld dle dll dlm dlo dlr dls dmb dmd dme dml dmm dmo dmr dms dob dod doe dol dom doo dor dos drb drd dre drl drm dro drr drs dsb dsd dse dsl dsm dso dsr dss ebb ebd ebe ebl ebm ebo ebr ebs ed- edb edd ede edl edm edo edr eds eeb eed eee eel eem eeo eer ees elb eld ele ell elm elo elr els em- emb emd eme eml emm emo emr ems eo- eob eod eoe eol eom eoo eor eos erb erd ere erl erm ero err ers es- esb esd ese esl esm eso esr ess lbb lbd lbe lbl lbm lbo lbr lbs ldb ldd lde ldl ldm ldo ldr lds leb led lee lel lem leo ler les llb lld lle lll llm llo llr lls lmb lmd lme lml lmm lmo lmr lms lob lod loe lol lom loo lor los lrb lrd lrm lro lrr lrs lsb lsd lse lsl lsm lso lsr lss m-o m-r mbb mbd mbe mbl mbm mbo mbr mbs mdb mdd mde mdl mdm mdo mdr mds meb med mee mel mem meo mer mes mlb mld mle mll mlm mlo mlr mls mmb mmd mme mml mmm mmo mmr mms mob mod moe mol mom moo mor mos mrb mrd mre mrl mrm mro mrr mrs msb msd mse msl msm mso msr mss ob- obb obd obe obl obm obo obr obs odb odd ode odl odm odo odr ods oeb oed oee oel oem oeo oer oes olb old ole oll olm olo ols om- omb omd ome oml omm omo omr oms oo- oob ood ool oom ooo oor oos or- orb ord ore orl orm oro orr ors os- osb osd ose osl osm oso osr oss rbb rbd rbe rbl rbm rbo rbr rbs rdb rdd rde rdl rdm rdo rdr rds re- reb red ree rel rem reo rer res rld rle rll rlm rlo rlr rls rmb rmd rme rml rmm rmo rmr rms rob rod roe rol rom roo ror ros rrb rrd rrl rrm rrr rrs rsb rsd rse rsl rsm rso rsr rss sbb sbd sbe sbl sbm sbo sbr sbs sdb sdd sde sdl sdm sdo sdr sds se- seb sed see sel sem seo ser ses slb sld sle sll slm slo slr sls smb smd sme sml smm smo smr sms sob sod soe sol som soo sor sos sr- srb srd sre srl srm sro srr srs ss- ssb ssd sse ssl ssm sso ssr sss