-ol bbb bbd bbl bbm bbo bbr bbs bbt bdb bdd bdl bdm bdo bdr bds bdt blb bld bll blm blo blr bls blt bmb bmd bml bmm bmo bmr bms bmt bob bod bol bom boo bor bos bot brb brd brl brm bro brr brs brt bsb bsd bsl bsm bso bsr bss bst btb btd btl btm bto btr bts btt dbb dbd dbl dbm dbo dbr dbs dbt ddb ddd ddl ddm ddo ddr dds ddt dl- dlb dld dll dlm dlo dlr dls dlt dmb dmd dml dmm dmo dmr dms dmt dob dod dol dom doo dor dos dot drb drd drl drm dro drr drs drt dsb dsd dsl dsm dso dsr dss dst dtb dtd dtl dtm dto dtr dts dtt lbb lbd lbl lbm lbo lbr lbs lbt ldb ldd ldl ldm ldo ldr lds ldt llb lld lll llm llo llr lls llt lmb lmd lml lmm lmo lmr lms lmt lob lod lol lom loo lor los lot lrb lrd lrm lro lrr lrs lrt lsb lsd lsl lsm lso lsr lss lst ltb ltd ltl ltm lto ltr lts ltt m-o m-r mbb mbd mbl mbm mbo mbr mbs mbt mdb mdd mdl mdm mdo mdr mds mdt mlb mld mll mlm mlo mlr mls mlt mmb mmd mml mmm mmo mmr mms mmt mob mod mol mom moo mor mos mot mrb mrd mrl mrm mro mrr mrs mrt msb msd msl msm mso msr mss mst mtb mtd mtl mtm mto mtr mts mtt ob- obb obd obl obm obo obr obs obt odb odd odl odm odo odr ods odt olb old oll olm olo ols olt om- omb omd oml omm omo omr oms omt oo- oob ood ool oom ooo oor oos oot or- orb ord orl orm oro orr ors ort os- osb osd osl osm oso osr oss ost ot- otb otd otl otm oto otr ots ott rbb rbd rbl rbm rbo rbr rbs rbt rdb rdd rdl rdm rdo rdr rds rdt rld rll rlm rlo rlr rls rlt rmb rmd rml rmm rmo rmr rms rmt rob rod rol rom roo ror ros rot rrb rrd rrl rrm rrr rrs rrt rsb rsd rsl rsm rso rsr rss rst rtb rtd rtl rtm rto rtr rts rtt sbb sbd sbl sbm sbo sbr sbs sbt sdb sdd sdl sdm sdo sdr sds sdt slb sld sll slm slo slr sls slt smb smd sml smm smo smr sms smt sob sod sol som soo sor sos sot sr- srb srd srl srm sro srr srs srt ss- ssb ssd ssl ssm sso ssr sss sst stb std stl stm sto str sts stt tbb tbd tbl tbm tbo tbr tbs tbt tdb tdd tdl tdm tdo tdr tds tdt tld tll tlm tlo tlr tls tlt tmb tmd tml tmm tmo tmr tms tmt to- tob tod tol tom too tor tos tot trb trd trl trm tro trr trs trt tsb tsd tsl tsm tso tsr tss tst ttb ttd ttl ttm tto ttr tts ttt