bbb bbd bbn bbo bbr bby bdb bdd bdo bdr bdy bdz bnb bnd bnn bno bnr bnz bob bod bon boo bor boy boz brb brd brn bro brr bry brz by- byd byn byo byr byz bzd bzn bzo bzr bzz dbb dbd dbn dbo dbr dby dbz ddb ddd ddn ddo ddr ddy ddz dnb dnd dnn dno dnr dny dnz dob dod don doo dor doy doz drb drd drn dro drr dry drz dy- dyb dyd dyn dyo dyr dyy dzb dzd dzo dzr nbb nbd nbn nbo nbr ndb ndd ndn ndo ndr ndy nnb nnn nno nnz no- nob nod non noo nor noy noz nrb nrd nrn nro nrr nry nrz nyd nyn nyo nyy nzb nzd nzo nzz ob- obb obd obn obo obr oby odb odd odn odo odr on- onb ond onn ono onr ony oo- oob ood oon ooo oor or- orb ord orn oro orr ory orz oyd oyo ozo ozz rbb rbd rbn rbo rbr rdb rdd rdn rdo rdr rdy rnb rnd rnn rno rnr rny rnz rob rod ron roo ror roy roz rrb rrd rrn rrr ry- ryd ryn ryo ryr ryy ryz rzb rzo rzy ybr yby ybz ydn ydo ydy ynd ynn yny yob yod yon yoo yor yoy yrn yro yyb yyy yyz yzb yzr yzy zbb zbr zby znd znn zno zo- zob zod zon zoo zor zro zzr zzy zzz