bbb bbi bbn bbo bbr bbt bi- bib bii bin bio bir bit biz bnb bni bnn bno bnr bnt bnz bob boi bon boo bor bot boz brb bri brn bro brr brt brz btb bti btn bto btr btt btz bzn bzo bzr bzz ibb ibi ibn ibo ibr ibt ibz iib iii iin iio iir iit in- inb ini inn ino inr int io- iob ioi ion ioo ior iot ir- irb iri irn iro irr irt itb iti itn ito itt itz izi izo izz n-i nbb nbi nbn nbo nbr nbt nib nii nin nio nir nit niz nnb nni nnn nno nnt nnz no- nob noi non noo nor not noz nrb nri nrn nro nrr nrt nrz ntb nti ntn nto ntr ntt ntz nzb nzi nzo nzz o-i ob- obb obi obn obo obr obt oib oii oin oio oir oit oiz on- onb oni onn ono onr ont oo- oob ooi oon ooo oor oot or- orb ori orn oro orr ort orz ot- otb oti otn oto otr ott otz ozo ozt ozz rbb rbi rbn rbo rbr rbt rib rii rin rio rir rit riz rnb rni rnn rno rnr rnt rnz rob roi ron roo ror rot roz rrb rri rrn rrr rrt rtb rti rtn rto rtr rtt rtz rzb rzo tbb tbi tbn tbo tbr tbt tbz tib tii tin tio tir tit tiz tnb tni tnn tno tnr tnt tnz to- tob toi ton too tor tot toz trb tri trn tro trr trt trz ttb tti ttn tto ttr ttt zbb zbr zbt zib zin zio zir zit ziz znn zno zo- zob zoi zon zoo zor zot zro ztr zzr zzt zzz