-er -ol bbb bbe bbf bbl bbm bbo bbr bbt be- beb bee bef bel bem beo ber bet bfb bfe bff bfl bfm bfo bfr bft blb ble blf bll blm blo blr blt bmb bme bmf bml bmm bmo bmr bmt bob boe bof bol bom boo bor bot brb bre brf brl brm bro brr brt btb bte btf btl btm bto btr btt ebb ebe ebf ebl ebm ebo ebr ebt eeb eee eef eel eem eeo eer eet ef- efb efe eff efl efm efo efr eft elb ele elf ell elm elo elr elt em- emb eme emf eml emm emo emr emt eo- eob eoe eof eol eom eoo eor eot erb ere erf erl erm ero err ert etb ete etf etl etm eto etr ett fbb fbe fbf fbl fbm fbo fbr fbt feb fee fef fel fem feo fer fet ffe fff ffl ffm ffo ffr fft flb fle flf fll flm flo flr flt fmb fme fmf fml fmm fmo fmr fmt fob foe fof fol fom foo for fot frb fre frf frl frm fro frr frt ftb fte ftf ftl ftm fto ftr ftt lbb lbe lbf lbl lbm lbo lbr lbt leb lee lef lel lem leo ler let lfb lfe lff lfl lfm lfo lfr lft llb lle llf lll llm llo llr llt lmb lme lmf lml lmm lmo lmr lmt lob loe lof lol lom loo lor lot lrb lrf lrm lro lrr lrt ltb lte ltf ltl ltm lto ltr ltt m-f m-o m-r mbb mbe mbf mbl mbm mbo mbr mbt meb mee mef mel mem meo mer met mfb mfe mff mfl mfm mfo mfr mft mlb mle mlf mll mlm mlo mlr mlt mmb mme mmf mml mmm mmo mmr mmt mob moe mof mol mom moo mor mot mrb mre mrf mrl mrm mro mrr mrt mtb mte mtf mtl mtm mto mtr mtt ob- obb obe obf obl obm obo obr obt oeb oee oef oel oem oeo oer oet of- ofb ofe off ofl ofm ofo ofr oft olb ole olf oll olm olo olt om- omb ome omf oml omm omo omr omt oo- oob oof ool oom ooo oor oot or- orb ore orf orl orm oro orr ort ot- otb ote otf otl otm oto otr ott rbb rbe rbf rbl rbm rbo rbr rbt re- reb ree ref rel rem reo rer ret rfb rfe rff rfl rfm rfo rfr rft rle rlf rll rlm rlo rlr rlt rmb rme rmf rml rmm rmo rmr rmt rob roe rof rol rom roo ror rot rrb rrf rrl rrm rrr rrt rtb rte rtf rtl rtm rto rtr rtt tbb tbe tbf tbl tbm tbo tbr tbt te- teb tee tef tel tem teo ter tet tfb tfe tff tfl tfm tfo tfr tft tle tlf tll tlm tlo tlr tlt tmb tme tmf tml tmm tmo tmr tmt to- tob toe tof tol tom too tor tot trb tre trf trl trm tro trr trt ttb tte ttf ttl ttm tto ttr ttt