bbb bbc bbh bbo bbr bby bcb bcc bch bco bcr bcy bcz bhb bhc bhh bho bhr bob boc boh boo bor boy boz brb brh bro brr bry brz by- byc byh byo byr byz bzh bzo bzr bzz c-- cbb cbc cbh cbo cbr cby cbz ccb ccc cch cco ccr ccz ch- chb chc chh cho chr chy chz co- cob coc coh coo cor coy coz crb crc crh cro crr cry crz cyb cyc cyo cyr cz- czc czo hbb hbc hbh hbo hbr hby hbz hcb hcc hch hco hcr hcy hhb hhc hhh hho hhr hhy hhz hob hoc hoh hoo hor hoy hr- hrb hrc hrh hro hrr hrz hy- hyb hyc hyh hyo hyr hyy hzo hzy ob- obb obc obh obo obr oby oc- ocb occ och oco ocr ocz ohc ohh oho ohr oo- oob ooc ooh ooo oor or- orb orc orh oro orr ory orz oyo ozo ozz rbb rbc rbh rbo rbr rcb rcc rch rco rcr rh- rhb rhc rhh rho rhr rob roc roh roo ror roy roz rrb rrc rrh rrr ry- ryc ryo ryr ryy ryz rzb rzo rzy ybc ybr yby ybz ycc ych yco ycy yhc yob yoc yoo yor yoy yrc yro yyb yyc yyy yyz yzb yzr yzy zbb zbc zbr zby zco zhc zho zhr zo- zob zoc zoo zor zrh zro zzr zzy zzz