-er bbb bbe bbm bbn bbo bbr bbs bbt be- beb bee bem ben beo ber bes bet bmb bme bmm bmn bmo bmr bms bmt bnb bne bnn bno bnr bns bnt bob boe bom bon boo bor bos bot brb bre brm brn bro brr brs brt bsb bse bsm bsn bso bsr bss bst btb bte btm btn bto btr bts btt ebb ebe ebm ebn ebo ebr ebs ebt eeb eee eem een eeo eer ees eet em- emb eme emm emn emo emr ems emt en- enb ene enm enn eno enr ens ent eo- eob eoe eom eon eoo eor eos eot erb ere erm ern ero err ers ert es- esb ese esm esn eso esr ess est etb ete etm etn eto etr ets ett m-o m-r mbb mbe mbm mbo mbr mbs mbt meb mee mem men meo mer mes met mmb mme mmm mmn mmo mmr mms mmt mnb mne mnm mnn mno mnr mns mnt mob moe mom mon moo mor mos mot mrb mre mrm mrn mro mrr mrs mrt msb mse msm msn mso msr mss mst mtb mte mtm mtn mto mtr mts mtt nbb nbe nbm nbn nbo nbr nbs nbt ne- neb nee nem nen neo ner nes net nmb nme nmm nmn nmo nmr nms nmt nnb nne nnm nnn nno nns nnt no- nob noe nom non noo nor nos not nrb nre nrm nrn nro nrr nrs nrt nsb nse nsm nsn nso nsr nss nst ntb nte ntm ntn nto ntr nts ntt ob- obb obe obm obn obo obr obs obt oeb oee oem oen oeo oer oes oet om- omb ome omm omn omo omr oms omt on- onb one onn ono onr ons ont oo- oob oom oon ooo oor oos oot or- orb ore orm orn oro orr ors ort os- osb ose osm osn oso osr oss ost ot- otb ote otm otn oto otr ots ott rbb rbe rbm rbn rbo rbr rbs rbt re- reb ree rem ren reo rer res ret rmb rme rmm rmn rmo rmr rms rmt rnb rnm rnn rno rnr rns rnt rob roe rom ron roo ror ros rot rrb rrm rrn rrr rrs rrt rsb rse rsm rsn rso rsr rss rst rtb rte rtm rtn rto rtr rts rtt sbb sbe sbm sbn sbo sbr sbs sbt se- seb see sem sen seo ser ses set smb sme smm smn smo smr sms smt snb sne snm snn sno snr sns snt sob soe som son soo sor sos sot sr- srb sre srm srn sro srr srs srt ss- ssb sse ssm ssn sso ssr sss sst stb ste stm stn sto str sts stt tbb tbe tbm tbn tbo tbr tbs tbt te- teb tee tem ten teo ter tes tet tmb tme tmm tmn tmo tmr tms tmt tnb tne tnm tnn tno tnr tns tnt to- tob toe tom ton too tor tos tot trb tre trm trn tro trr trs trt tsb tse tsm tsn tso tsr tss tst ttb tte ttm ttn tto ttr tts ttt