-th bbb bbf bbh bbi bbo bbr bbs bbt bfb bff bfh bfi bfo bfr bfs bft bhb bhf bhh bhi bho bhr bhs bht bi- bib bif bih bii bio bir bis bit bob bof boh boi boo bor bos bot brb brf brh bri bro brr brs brt bsb bsf bsh bsi bso bsr bss bst btb btf bth bti bto btr bts btt fbb fbf fbh fbi fbo fbr fbs fbt fff ffh ffi ffo ffr ffs fft fhb fhf fhh fhi fho fhr fhs fib fif fih fii fir fis fit fob fof foh foi foo for fos fot frb frf frh fri fro frr frs frt fsb fsf fsh fsi fso fsr fss fst ftb ftf fth fti fto ftr fts ftt h-i hbb hbf hbh hbi hbo hbr hbs hbt hfb hff hfh hfi hfo hfr hfs hft hhb hhf hhh hhi hho hhr hhs hht hib hif hih hii hio hir his hit hob hof hoh hoi hoo hor hos hot hr- hrb hrf hrh hri hro hrr hrs hrt hsb hsf hsh hsi hsr hss hst htb htf hth hti hto htr hts htt i-f ibb ibf ibh ibi ibo ibr ibs ibt ifb iff ifi ifo ifr ifs ift ihb ihf ihh ihi iho ihr ihs iht iib iif iih iii iio iir iis iit io- iob iof ioh ioi ioo ior ios iot ir- irb irf iri iro irr irs irt is- isb isf ish isi iso isr iss ist itb itf ith iti ito its itt o-i ob- obb obf obh obi obo obr obs obt of- ofb off ofi ofo ofr ofs oft ohf ohh ohi oho ohr ohs oht oib oif oii oio oir ois oit oo- oob oof ooh ooi ooo oor oos oot or- orb orf orh ori oro orr ors ort os- osb osf osh osi oso osr oss ost ot- otb otf oth oti oto otr ots ott rbb rbf rbh rbi rbo rbr rbs rbt rfb rff rfh rfi rfo rfr rfs rft rh- rhb rhf rhh rhi rho rhr rhs rht rib rif rih rii rio rir ris rit rob rof roh roi roo ror ros rot rrb rrf rrh rri rrr rrs rrt rsb rsf rsh rsi rso rsr rss rst rtb rtf rti rto rtr rts rtt sbb sbf sbh sbi sbo sbr sbs sbt sfb sff sfh sfi sfo sfr sfs sft sh- shb shf shh shi sho shr shs sht sib sif sih sii sio sir sis sit sob sof soh soi soo sor sos sot sr- srb srf srh sri sro srr srs srt ss- ssb ssf ssh ssi sso ssr sss sst stb stf sth sti sto str sts stt tbb tbf tbh tbi tbo tbr tbs tbt tfb tff tfh tfi tfo tfr tfs tft th- thb thf thh thi tho thr ths tht tib tif tih tii tio tir tis tit to- tob tof toh toi too tor tos tot trb trf trh tri tro trr trs trt tsb tsf tsh tsi tso tsr tss tst ttb ttf tth tti tto ttr tts ttt