bbb bbf bbi bbm bbo bbr bbs bbt bfb bff bfi bfm bfo bfr bfs bft bi- bib bif bii bim bio bir bis bit bmb bmf bmi bmm bmo bmr bms bmt bob bof boi bom boo bor bos bot brb brf bri brm bro brr brs brt bsb bsf bsi bsm bso bsr bss bst btb btf bti btm bto btr bts btt fbb fbf fbi fbm fbo fbr fbs fbt fff ffi ffm ffo ffr ffs fft fib fif fii fim fir fis fit fmb fmf fmi fmm fmo fmr fms fmt fob fof foi fom foo for fos fot frb frf fri frm fro frr frs frt fsb fsf fsi fsm fso fsr fss fst ftb ftf fti ftm fto ftr fts ftt i-f ibb ibf ibi ibm ibo ibr ibs ibt ifb iff ifi ifm ifo ifr ifs ift iib iif iii iim iio iir iis iit im- imb imf imi imm imo ims imt io- iob iof ioi iom ioo ior ios iot ir- irb irf iri irm iro irr irs irt is- isb isf isi ism iso isr iss ist itb itf iti itm ito its itt m-f m-o m-r mbb mbf mbi mbm mbo mbr mbs mbt mfb mff mfi mfm mfo mfr mfs mft mi- mib mif mii mim mio mir mis mit mmb mmf mmi mmm mmo mmr mms mmt mob mof moi mom moo mor mos mot mrb mrf mri mrm mro mrr mrs mrt msb msf msi msm mso msr mss mst mtb mtf mti mtm mto mtr mts mtt o-i ob- obb obf obi obm obo obr obs obt of- ofb off ofi ofm ofo ofr ofs oft oib oif oii oim oio oir ois oit om- omb omf omi omm omo omr oms omt oo- oob oof ooi oom ooo oor oos oot or- orb orf ori orm oro orr ors ort os- osb osf osi osm oso osr oss ost ot- otb otf oti otm oto otr ots ott rbb rbf rbi rbm rbo rbr rbs rbt rfb rff rfi rfm rfo rfr rfs rft rib rif rii rim rio rir ris rit rmb rmf rmi rmm rmo rmr rms rmt rob rof roi rom roo ror ros rot rrb rrf rri rrm rrr rrs rrt rsb rsf rsi rsm rso rsr rss rst rtb rtf rti rtm rto rtr rts rtt sbb sbf sbi sbm sbo sbr sbs sbt sfb sff sfi sfm sfo sfr sfs sft sib sif sii sim sio sir sis sit smb smf smi smm smo smr sms smt sob sof soi som soo sor sos sot sr- srb srf sri srm sro srr srs srt ss- ssb ssf ssi ssm sso ssr sss sst stb stf sti stm sto str sts stt tbb tbf tbi tbm tbo tbr tbs tbt tfb tff tfi tfm tfo tfr tfs tft tib tif tii tim tio tir tis tit tmb tmf tmi tmm tmo tmr tms tmt to- tob tof toi tom too tor tos tot trb trf tri trm tro trr trs trt tsb tsf tsi tsm tso tsr tss tst ttb ttf tti ttm tto ttr tts ttt