bbb bbi bbm bbo bbr bbs bbt bi- bib bii bim bio bir bis bit bmb bmi bmm bmo bmr bms bmt bob boi bom boo bor bos bot brb bri brm bro brr brs brt bsb bsi bsm bso bsr bss bst btb bti btm bto btr bts btt ibb ibi ibm ibo ibr ibs ibt iib iii iim iio iir iis iit im- imb imi imm imo ims imt io- iob ioi iom ioo ior ios iot ir- irb iri irm iro irr irs irt is- isb isi ism iso isr iss ist itb iti itm ito its itt m-o m-r mbb mbi mbm mbo mbr mbs mbt mi- mib mii mim mio mir mis mit mmb mmi mmm mmo mmr mms mmt mob moi mom moo mor mos mot mrb mri mrm mro mrr mrs mrt msb msi msm mso msr mss mst mtb mti mtm mto mtr mts mtt o-i ob- obb obi obm obo obr obs obt oib oii oim oio oir ois oit om- omb omi omm omo omr oms omt oo- oob ooi oom ooo oor oos oot or- orb ori orm oro orr ors ort os- osb osi osm oso osr oss ost ot- otb oti otm oto otr ots ott rbb rbi rbm rbo rbr rbs rbt rib rii rim rio rir ris rit rmb rmi rmm rmo rmr rms rmt rob roi rom roo ror ros rot rrb rri rrm rrr rrs rrt rsb rsi rsm rso rsr rss rst rtb rti rtm rto rtr rts rtt sbb sbi sbm sbo sbr sbs sbt sib sii sim sio sir sis sit smb smi smm smo smr sms smt sob soi som soo sor sos sot sr- srb sri srm sro srr srs srt ss- ssb ssi ssm sso ssr sss sst stb sti stm sto str sts stt tbb tbi tbm tbo tbr tbs tbt tib tii tim tio tir tis tit tmb tmi tmm tmo tmr tms tmt to- tob toi tom too tor tos tot trb tri trm tro trr trs trt tsb tsi tsm tso tsr tss tst ttb tti ttm tto ttr tts ttt