bbb bbd bbn bbo bbr bbs bbt bdb bdd bdo bdr bds bdt bnb bnd bnn bno bnr bns bnt bob bod bon boo bor bos bot brb brd brn bro brr brs brt bsb bsd bsn bso bsr bss bst btb btd btn bto btr bts btt dbb dbd dbn dbo dbr dbs dbt ddb ddd ddn ddo ddr dds ddt dnb dnd dnn dno dnr dns dnt dob dod don doo dor dos dot drb drd drn dro drr drs drt dsb dsd dsn dso dsr dss dst dtb dtd dtn dto dtr dts dtt nbb nbd nbn nbo nbr nbs nbt ndb ndd ndn ndo ndr nds ndt nnb nnn nno nns nnt no- nob nod non noo nor nos not nrb nrd nrn nro nrr nrs nrt nsb nsd nsn nso nsr nss nst ntb ntd ntn nto ntr nts ntt ob- obb obd obn obo obr obs obt odb odd odn odo odr ods odt on- onb ond onn ono onr ons ont oo- oob ood oon ooo oor oos oot or- orb ord orn oro orr ors ort os- osb osd osn oso osr oss ost ot- otb otd otn oto otr ots ott rbb rbd rbn rbo rbr rbs rbt rdb rdd rdn rdo rdr rds rdt rnb rnd rnn rno rnr rns rnt rob rod ron roo ror ros rot rrb rrd rrn rrr rrs rrt rsb rsd rsn rso rsr rss rst rtb rtd rtn rto rtr rts rtt sbb sbd sbn sbo sbr sbs sbt sdb sdd sdn sdo sdr sds sdt snb snd snn sno snr sns snt sob sod son soo sor sos sot sr- srb srd srn sro srr srs srt ss- ssb ssd ssn sso ssr sss sst stb std stn sto str sts stt tbb tbd tbn tbo tbr tbs tbt tdb tdd tdn tdo tdr tds tdt tnb tnd tnn tno tnr tns tnt to- tob tod ton too tor tos tot trb trd trn tro trr trs trt tsb tsd tsn tso tsr tss tst ttb ttd ttn tto ttr tts ttt