bbb bbi bbn bbo bbr bby bi- bib bii bin bio bir biy biz bnb bni bnn bno bnr bnz bob boi bon boo bor boy boz brb bri brn bro brr bry brz by- byi byn byo byr byz bzn bzo bzr bzz ibb ibi ibn ibo ibr iby ibz iib iii iin iio iir in- inb ini inn ino inr iny io- iob ioi ion ioo ior ir- irb iri irn iro irr iry iyo iyr iyy izi izo izy izz n-i nbb nbi nbn nbo nbr nib nii nin nio nir niz nnb nni nnn nno nnz no- nob noi non noo nor noy noz nrb nri nrn nro nrr nry nrz nyn nyo nyy nzb nzi nzo nzz o-i ob- obb obi obn obo obr oby oib oii oin oio oir oiz on- onb oni onn ono onr ony oo- oob ooi oon ooo oor or- orb ori orn oro orr ory orz oyi oyo ozo ozz rbb rbi rbn rbo rbr rib rii rin rio rir riy riz rnb rni rnn rno rnr rny rnz rob roi ron roo ror roy roz rrb rri rrn rrr ry- ryn ryo ryr ryy ryz rzb rzo rzy ybi ybr yby ybz yii yin yio yir yiz ynn yny yob yoi yon yoo yor yoy yrn yro yyb yyy yyz yzb yzr yzy zbb zbr zby zib zin zio zir ziz znn zno zo- zob zoi zon zoo zor zro zzr zzy zzz