bbb bbm bbo bbr bbs bbt bby bmb bmm bmo bmr bms bmt bob bom boo bor bos bot boy brb brm bro brr brs brt bry bsb bsm bso bsr bss bst bsy btb btm bto btr bts btt bty by- bym byo byr bys byt m-o m-r mbb mbm mbo mbr mbs mbt mmb mmm mmo mmr mms mmt mob mom moo mor mos mot moy mrb mrm mro mrr mrs mrt mry msb msm mso msr mss mst msy mtb mtm mto mtr mts mtt my- myb mym myo myr mys myt ob- obb obm obo obr obs obt oby om- omb omm omo omr oms omt omy oo- oob oom ooo oor oos oot or- orb orm oro orr ors ort ory os- osb osm oso osr oss ost ot- otb otm oto otr ots ott oyo oys rbb rbm rbo rbr rbs rbt rmb rmm rmo rmr rms rmt rob rom roo ror ros rot roy rrb rrm rrr rrs rrt rsb rsm rso rsr rss rst rtb rtm rto rtr rts rtt rty ry- rym ryo ryr rys ryy sbb sbm sbo sbr sbs sbt sby smb smm smo smr sms smt smy sob som soo sor sos sot soy sr- srb srm sro srr srs srt sry ss- ssb ssm sso ssr sss sst stb stm sto str sts stt sty sy- syb sym syr sys syt tbb tbm tbo tbr tbs tbt tmb tmm tmo tmr tms tmt tmy to- tob tom too tor tos tot toy trb trm tro trr trs trt try tsb tsm tso tsr tss tst tsy ttb ttm tto ttr tts ttt tty tym tyo tyr tys tyt ybm ybr ybs yby ymm ymo yms ymt yob yom yoo yor yos yot yoy yro yrs yrt ysb ysm yso ysr yss yst ysy ytm yto ytr yts ytt yyb yys yyt yyy