bbb bbg bbi bbn bbr bbs bgb bgg bgi bgn bgr bgs bi- bib big bii bin bir bis bnb bng bni bnn bnr bns brb brg bri brn brr brs bsb bsg bsi bsn bsr bss gbg gbi gbn gbr gbs ggb ggg ggi ggn ggr ggs gib gig gii gin gir gis gnb gni gnn gnr gns grb grg gri grn grr grs gsb gsg gsi gsn gsr gss ibb ibg ibi ibn ibr ibs igb igg igi ign igr igs iib iii iin iir iis in- inb ing ini inn inr ins ir- irb irg iri irn irr irs is- isb isg isi isn isr iss n-i nbb nbg nbi nbn nbr nbs ngb ngg ngi ngn ngs nib nig nii nin nir nis nnb nng nni nnn nns nrb nrg nri nrn nrr nrs nsb nsg nsi nsn nsr nss rbb rbg rbi rbn rbr rbs rgb rgg rgi rgn rgr rgs rib rig rii rin rir ris rnb rng rni rnn rnr rns rrb rrg rri rrn rrr rrs rsb rsg rsi rsn rsr rss sbb sbg sbi sbn sbr sbs sgb sgg sgi sgn sgr sgs sib sig sii sin sir sis snb sng sni snn snr sns sr- srb srg sri srn srr srs ss- ssb ssg ssi ssn ssr sss