bbb bbi bbn bbo bbr bi- bib bii bin bio bir biv bnb bni bnn bno bnr bnv bob boi bon boo bor bov brb bri brn bro brr brv bvb bvi bvn bvo bvr bvv i-v ibb ibi ibn ibo ibr ibv iib iii iin iio iir in- inb ini inn ino inr inv io- iob ioi ion ioo ior iov ir- irb iri irn iro irr irv ivb ivi ivo ivr ivv n-i nbb nbi nbn nbo nbr nbv nib nii nin nio nir niv nnb nni nnn nno nnv no- nob noi non noo nor nov nrb nri nrn nro nrr nrv nvb nvi nvn nvv o-i ob- obb obi obn obo obr obv oib oii oin oio oir oiv on- onb oni onn ono onr oo- oob ooi oon ooo oor oov or- orb ori orn oro orr orv ov- ovb ovi ovo ovv rbb rbi rbn rbo rbr rib rii rin rio rir riv rnb rni rnn rno rnr rnv rob roi ron roo ror rov rrb rri rrn rrr rvb rvi rvn rvo rvr rvv vbi vbo vbr vbv vi- vib vii vin vio vir viv vn- vni vno vnr vnv vob voi von voo vor vov vrb vri vrn vrr vvb vvi vvo vvr vvv