-ic bbb bbc bbh bbi bbr bby bcb bcc bch bci bcr bcy bhb bhc bhh bhi bhr bi- bib bic bih bii bir biy brb brh bri brr bry by- byc byh byi byr c-- cbb cbc cbh cbi cbr cby ccb ccc cch cci ccr ch- chb chc chh chi chr chy ci- cib cic cih cii cir crb crc crh cri crr cry cyb cyc cyr h-i hbb hbc hbh hbi hbr hby hcb hcc hch hci hcr hcy hhb hhc hhh hhi hhr hhy hib hic hih hii hir hr- hrb hrc hrh hri hrr hy- hyb hyc hyh hyi hyr hyy ibb ibc ibh ibi ibr iby icb icc ich ici icr icy ihb ihc ihh ihi ihr ihy iib iic iih iii iir ir- irb irc iri irr iry iyc iyr iyy rbb rbc rbh rbi rbr rcb rcc rch rci rcr rh- rhb rhc rhh rhi rhr rib ric rih rii rir riy rrb rrc rrh rri rrr ry- ryc ryr ryy ybc ybi ybr yby ycc ych yci ycy yhc yhi yih yii yir yrc yyb yyc yyy