bbb bbm bbn bbo bbr bby bmb bmm bmn bmo bmr bnb bnn bno bnr bob bom bon boo bor boy brb brm brn bro brr bry by- bym byn byo byr m-o m-r mbb mbm mbo mbr mmb mmm mmn mmo mmr mnb mnm mnn mno mnr mob mom mon moo mor moy mrb mrm mrn mro mrr mry my- myb mym myn myo myr nbb nbm nbn nbo nbr nmb nmm nmn nmo nmr nnb nnm nnn nno no- nob nom non noo nor noy nrb nrm nrn nro nrr nry nym nyn nyo nyy ob- obb obm obn obo obr oby om- omb omm omn omo omr omy on- onb onn ono onr ony oo- oob oom oon ooo oor or- orb orm orn oro orr ory oyo rbb rbm rbn rbo rbr rmb rmm rmn rmo rmr rnb rnm rnn rno rnr rny rob rom ron roo ror roy rrb rrm rrn rrr ry- rym ryn ryo ryr ryy ybm ybr yby ymm ymo ynn yny yob yom yon yoo yor yoy yrn yro yyb yyy