-ic bbb bbc bbh bbi bbr bbs bcb bcc bch bci bcr bcs bhb bhc bhh bhi bhr bhs bi- bib bic bih bii bir bis brb brh bri brr brs bsb bsc bsh bsi bsr bss c-- cbb cbc cbh cbi cbr cbs ccb ccc cch cci ccr ccs ch- chb chc chh chi chr chs ci- cib cic cih cii cir cis crb crc crh cri crr crs csb csc csh csi csr css h-i hbb hbc hbh hbi hbr hbs hcb hcc hch hci hcr hcs hhb hhc hhh hhi hhr hhs hib hic hih hii hir his hr- hrb hrc hrh hri hrr hrs hsb hsc hsh hsi hsr hss ibb ibc ibh ibi ibr ibs icb icc ich ici icr ics ihb ihc ihh ihi ihr ihs iib iic iih iii iir iis ir- irb irc iri irr irs is- isb isc ish isi isr iss rbb rbc rbh rbi rbr rbs rcb rcc rch rci rcr rcs rh- rhb rhc rhh rhi rhr rhs rib ric rih rii rir ris rrb rrc rrh rri rrr rrs rsb rsc rsh rsi rsr rss sbb sbc sbh sbi sbr sbs scb scc sch sci scr scs sh- shb shc shh shi shr shs sib sic sih sii sir sis sr- srb src srh sri srr srs ss- ssb ssc ssh ssi ssr sss