-er bbb bbe bbf bbm bbn bbo bbr bbs bbt be- beb bee bef bem ben beo ber bes bet bfb bfe bff bfm bfn bfo bfr bfs bft bmb bme bmf bmm bmn bmo bmr bms bmt bnb bne bnf bnn bno bnr bns bnt bob boe bof bom bon boo bor bos bot brb bre brf brm brn bro brr brs brt bsb bse bsf bsm bsn bso bsr bss bst btb bte btf btm btn bto btr bts btt ebb ebe ebf ebm ebn ebo ebr ebs ebt eeb eee eef eem een eeo eer ees eet ef- efb efe eff efm efo efr efs eft em- emb eme emf emm emn emo emr ems emt en- enb ene enf enm enn eno enr ens ent eo- eob eoe eof eom eon eoo eor eos eot erb ere erf erm ern ero err ers ert es- esb ese esf esm esn eso esr ess est etb ete etf etm etn eto etr ets ett fbb fbe fbf fbm fbn fbo fbr fbs fbt feb fee fef fem fen feo fer fes fet ffe fff ffm ffn ffo ffr ffs fft fmb fme fmf fmm fmn fmo fmr fms fmt fnb fne fnf fnm fnn fnr fns fnt fob foe fof fom fon foo for fos fot frb fre frf frm frn fro frr frs frt fsb fse fsf fsm fsn fso fsr fss fst ftb fte ftf ftm ftn fto ftr fts ftt m-f m-o m-r mbb mbe mbf mbm mbo mbr mbs mbt meb mee mef mem men meo mer mes met mfb mfe mff mfm mfn mfo mfr mfs mft mmb mme mmf mmm mmn mmo mmr mms mmt mnb mne mnf mnm mnn mno mnr mns mnt mob moe mof mom mon moo mor mos mot mrb mre mrf mrm mrn mro mrr mrs mrt msb mse msf msm msn mso msr mss mst mtb mte mtf mtm mtn mto mtr mts mtt nbb nbe nbf nbm nbn nbo nbr nbs nbt ne- neb nee nef nem nen neo ner nes net nfb nfe nff nfn nfo nfr nfs nft nmb nme nmm nmn nmo nmr nms nmt nnb nne nnf nnm nnn nno nns nnt no- nob noe nof nom non noo nor nos not nrb nre nrf nrm nrn nro nrr nrs nrt nsb nse nsf nsm nsn nso nsr nss nst ntb nte ntf ntm ntn nto ntr nts ntt ob- obb obe obf obm obn obo obr obs obt oeb oee oef oem oen oeo oer oes oet of- ofb ofe off ofm ofn ofo ofr ofs oft om- omb ome omf omm omn omo omr oms omt on- onb one onf onn ono onr ons ont oo- oob oof oom oon ooo oor oos oot or- orb ore orf orm orn oro orr ors ort os- osb ose osf osm osn oso osr oss ost ot- otb ote otf otm otn oto otr ots ott rbb rbe rbf rbm rbn rbo rbr rbs rbt re- reb ree ref rem ren reo rer res ret rfb rfe rff rfm rfn rfo rfr rfs rft rmb rme rmf rmm rmn rmo rmr rms rmt rnb rnm rnn rno rnr rns rnt rob roe rof rom ron roo ror ros rot rrb rrf rrm rrn rrr rrs rrt rsb rse rsf rsm rsn rso rsr rss rst rtb rte rtf rtm rtn rto rtr rts rtt sbb sbe sbf sbm sbn sbo sbr sbs sbt se- seb see sef sem sen seo ser ses set sfb sfe sff sfm sfn sfo sfr sfs sft smb sme smf smm smn smo smr sms smt snb sne snf snm snn sno snr sns snt sob soe sof som son soo sor sos sot sr- srb sre srf srm srn sro srr srs srt ss- ssb sse ssf ssm ssn sso ssr sss sst stb ste stf stm stn sto str sts stt tbb tbe tbf tbm tbn tbo tbr tbs tbt te- teb tee tef tem ten teo ter tes tet tfb tfe tff tfm tfn tfo tfr tfs tft tmb tme tmf tmm tmn tmo tmr tms tmt tnb tne tnf tnm tnn tno tnr tns tnt to- tob toe tof tom ton too tor tos tot trb tre trf trm trn tro trr trs trt tsb tse tsf tsm tsn tso tsr tss tst ttb tte ttf ttm ttn tto ttr tts ttt