bbb bbc bbh bbr bby bcb bcc bch bcr bcy bhb bhc bhh bhr brb brh brr bry by- byc byh byr c-- cbb cbc cbh cbr cby ccb ccc cch ccr ch- chb chc chh chr chy crb crc crh crr cry cyb cyc cyr hbb hbc hbh hbr hby hcb hcc hch hcr hcy hhb hhc hhh hhr hhy hr- hrb hrc hrh hrr hy- hyb hyc hyh hyr hyy rbb rbc rbh rbr rcb rcc rch rcr rh- rhb rhc rhh rhr rrb rrc rrh rrr ry- ryc ryr ryy ybc ybr yby ycc ych ycy yhc yrc yyb yyc yyy