bbb bbm bbn bbo bbr bbs bbt bmb bmm bmn bmo bmr bms bmt bnb bnn bno bnr bns bnt bob bom bon boo bor bos bot brb brm brn bro brr brs brt bsb bsm bsn bso bsr bss bst btb btm btn bto btr bts btt m-o m-r mbb mbm mbo mbr mbs mbt mmb mmm mmn mmo mmr mms mmt mnb mnm mnn mno mnr mns mnt mob mom mon moo mor mos mot mrb mrm mrn mro mrr mrs mrt msb msm msn mso msr mss mst mtb mtm mtn mto mtr mts mtt nbb nbm nbn nbo nbr nbs nbt nmb nmm nmn nmo nmr nms nmt nnb nnm nnn nno nns nnt no- nob nom non noo nor nos not nrb nrm nrn nro nrr nrs nrt nsb nsm nsn nso nsr nss nst ntb ntm ntn nto ntr nts ntt ob- obb obm obn obo obr obs obt om- omb omm omn omo omr oms omt on- onb onn ono onr ons ont oo- oob oom oon ooo oor oos oot or- orb orm orn oro orr ors ort os- osb osm osn oso osr oss ost ot- otb otm otn oto otr ots ott rbb rbm rbn rbo rbr rbs rbt rmb rmm rmn rmo rmr rms rmt rnb rnm rnn rno rnr rns rnt rob rom ron roo ror ros rot rrb rrm rrn rrr rrs rrt rsb rsm rsn rso rsr rss rst rtb rtm rtn rto rtr rts rtt sbb sbm sbn sbo sbr sbs sbt smb smm smn smo smr sms smt snb snm snn sno snr sns snt sob som son soo sor sos sot sr- srb srm srn sro srr srs srt ss- ssb ssm ssn sso ssr sss sst stb stm stn sto str sts stt tbb tbm tbn tbo tbr tbs tbt tmb tmm tmn tmo tmr tms tmt tnb tnm tnn tno tnr tns tnt to- tob tom ton too tor tos tot trb trm trn tro trr trs trt tsb tsm tsn tso tsr tss tst ttb ttm ttn tto ttr tts ttt