-er bbb bbe bbi bbm bbn bbo bbr bbs bbt be- beb bee bei bem ben beo ber bes bet bi- bib bie bii bim bin bio bir bis bit bmb bme bmi bmm bmn bmo bmr bms bmt bnb bne bni bnn bno bnr bns bnt bob boe boi bom bon boo bor bos bot brb bre bri brm brn bro brr brs brt bsb bse bsi bsm bsn bso bsr bss bst btb bte bti btm btn bto btr bts btt ebb ebe ebi ebm ebn ebo ebr ebs ebt eeb eee eem een eeo eer ees eet eib eie eii eim ein eio eir eis eit em- emb eme emi emm emn emo emr ems emt en- enb ene eni enm enn eno enr ens ent eo- eob eoe eoi eom eon eoo eor eos eot erb ere eri erm ern ero err ers ert es- esb ese esi esm esn eso esr ess est etb ete eti etm etn eto etr ets ett ibb ibe ibi ibm ibn ibo ibr ibs ibt ie- iee iei iem ien ier ies iet iib iie iii iim iin iio iir iis iit im- imb ime imi imm imn imo ims imt in- inb ine ini inm inn ino inr ins int io- iob ioe ioi iom ion ioo ior ios iot ir- irb ire iri irm irn iro irr irs irt is- isb ise isi ism isn iso isr iss ist itb ite iti itm itn ito its itt m-o m-r mbb mbe mbi mbm mbo mbr mbs mbt meb mee mei mem men meo mer mes met mi- mib mie mii mim min mio mir mis mit mmb mme mmi mmm mmn mmo mmr mms mmt mnb mne mni mnm mnn mno mnr mns mnt mob moe moi mom mon moo mor mos mot mrb mre mri mrm mrn mro mrr mrs mrt msb mse msi msm msn mso msr mss mst mtb mte mti mtm mtn mto mtr mts mtt n-i nbb nbe nbi nbm nbn nbo nbr nbs nbt ne- neb nee nei nem nen neo ner nes net nib nie nii nim nin nio nir nis nit nmb nme nmi nmm nmn nmo nmr nms nmt nnb nne nni nnm nnn nno nns nnt no- nob noe noi nom non noo nor nos not nrb nre nri nrm nrn nro nrr nrs nrt nsb nse nsi nsm nsn nso nsr nss nst ntb nte nti ntm ntn nto ntr nts ntt o-i ob- obb obe obi obm obn obo obr obs obt oeb oee oei oem oen oeo oer oes oet oib oie oii oim oin oio oir ois oit om- omb ome omi omm omn omo omr oms omt on- onb one oni onn ono onr ons ont oo- oob ooi oom oon ooo oor oos oot or- orb ore ori orm orn oro orr ors ort os- osb ose osi osm osn oso osr oss ost ot- otb ote oti otm otn oto otr ots ott rbb rbe rbi rbm rbn rbo rbr rbs rbt re- reb ree rei rem ren reo rer res ret rib rie rii rim rin rio rir ris rit rmb rme rmi rmm rmn rmo rmr rms rmt rnb rni rnm rnn rno rnr rns rnt rob roe roi rom ron roo ror ros rot rrb rri rrm rrn rrr rrs rrt rsb rse rsi rsm rsn rso rsr rss rst rtb rte rti rtm rtn rto rtr rts rtt sbb sbe sbi sbm sbn sbo sbr sbs sbt se- seb see sei sem sen seo ser ses set sib sie sii sim sin sio sir sis sit smb sme smi smm smn smo smr sms smt snb sne sni snm snn sno snr sns snt sob soe soi som son soo sor sos sot sr- srb sre sri srm srn sro srr srs srt ss- ssb sse ssi ssm ssn sso ssr sss sst stb ste sti stm stn sto str sts stt tbb tbe tbi tbm tbn tbo tbr tbs tbt te- teb tee tei tem ten teo ter tes tet tib tie tii tim tin tio tir tis tit tmb tme tmi tmm tmn tmo tmr tms tmt tnb tne tni tnm tnn tno tnr tns tnt to- tob toe toi tom ton too tor tos tot trb tre tri trm trn tro trr trs trt tsb tse tsi tsm tsn tso tsr tss tst ttb tte tti ttm ttn tto ttr tts ttt