bbb bbd bbm bbo bbs bbt bdb bdd bdm bdo bds bdt bmb bmd bmm bmo bms bmt bob bod bom boo bos bot bsb bsd bsm bso bss bst btb btd btm bto bts btt dbb dbd dbm dbo dbs dbt ddb ddd ddm ddo dds ddt dmb dmd dmm dmo dms dmt dob dod dom doo dos dot dsb dsd dsm dso dss dst dtb dtd dtm dto dts dtt m-o mbb mbd mbm mbo mbs mbt mdb mdd mdm mdo mds mdt mmb mmd mmm mmo mms mmt mob mod mom moo mos mot msb msd msm mso mss mst mtb mtd mtm mto mts mtt ob- obb obd obm obo obs obt odb odd odm odo ods odt om- omb omd omm omo oms omt oo- oob ood oom ooo oos oot os- osb osd osm oso oss ost ot- otb otd otm oto ots ott sbb sbd sbm sbo sbs sbt sdb sdd sdm sdo sds sdt smb smd smm smo sms smt sob sod som soo sos sot ss- ssb ssd ssm sso sss sst stb std stm sto sts stt tbb tbd tbm tbo tbs tbt tdb tdd tdm tdo tds tdt tmb tmd tmm tmo tms tmt to- tob tod tom too tos tot tsb tsd tsm tso tss tst ttb ttd ttm tto tts ttt