bbb bbf bbi bbm bbn bbr bbs bfb bff bfi bfm bfn bfr bfs bi- bib bif bii bim bin bir bis bmb bmf bmi bmm bmn bmr bms bnb bnf bni bnn bnr bns brb brf bri brm brn brr brs bsb bsf bsi bsm bsn bsr bss fbb fbf fbi fbm fbn fbr fbs fff ffi ffm ffn ffr ffs fib fif fii fim fin fir fis fmb fmf fmi fmm fmn fmr fms fnb fnf fni fnm fnn fnr fns frb frf fri frm frn frr frs fsb fsf fsi fsm fsn fsr fss i-f ibb ibf ibi ibm ibn ibr ibs ifb iff ifi ifm ifn ifr ifs iib iif iii iim iin iir iis im- imb imf imi imm imn ims in- inb inf ini inm inn inr ins ir- irb irf iri irm irn irr irs is- isb isf isi ism isn isr iss m-f m-r mbb mbf mbi mbm mbr mbs mfb mff mfi mfm mfn mfr mfs mi- mib mif mii mim min mir mis mmb mmf mmi mmm mmn mmr mms mnb mnf mni mnm mnn mnr mns mrb mrf mri mrm mrn mrr mrs msb msf msi msm msn msr mss n-i nbb nbf nbi nbm nbn nbr nbs nfb nff nfi nfn nfr nfs nib nif nii nim nin nir nis nmb nmi nmm nmn nmr nms nnb nnf nni nnm nnn nns nrb nrf nri nrm nrn nrr nrs nsb nsf nsi nsm nsn nsr nss rbb rbf rbi rbm rbn rbr rbs rfb rff rfi rfm rfn rfr rfs rib rif rii rim rin rir ris rmb rmf rmi rmm rmn rmr rms rnb rni rnm rnn rnr rns rrb rrf rri rrm rrn rrr rrs rsb rsf rsi rsm rsn rsr rss sbb sbf sbi sbm sbn sbr sbs sfb sff sfi sfm sfn sfr sfs sib sif sii sim sin sir sis smb smf smi smm smn smr sms snb snf sni snm snn snr sns sr- srb srf sri srm srn srr srs ss- ssb ssf ssi ssm ssn ssr sss