bbb bbi bbk bbn bbo bbr bbt bi- bib bii bik bin bio bir bit biv bkb bkk bkn bko bkr bkt bkv bnb bni bnk bnn bno bnr bnt bnv bob boi bok bon boo bor bot bov brb bri brk brn bro brr brt brv btb bti btk btn bto btr btt btv bvb bvi bvk bvn bvo bvr bvt bvv i-v ibb ibi ibk ibn ibo ibr ibt ibv iib iii iin iio iir iit ikb iki ikk iko ikr ikt ikv in- inb ini ink inn ino inr int inv io- iob ioi ion ioo ior iot iov ir- irb iri irk irn iro irr irt irv itb iti itk itn ito itt itv ivb ivi ivo ivr ivt ivv k-t kbb kbi kbk kbn kbo kbr kib kii kik kin kio kir kit kiv kkb kki kkk kkn kkr kkt kkv kn- kni knk knn kno knr knt kob koi kok kon koo kor kot kri krk krn kro krr krt krv ktb ktk ktn kto ktr ktt ktv kvb kvi kvk kvn kvo kvr kvv n-i nbb nbi nbk nbn nbo nbr nbt nbv nib nii nik nin nio nir nit niv nki nkk nkn nko nkr nkt nnb nni nnk nnn nno nnt nnv no- nob noi nok non noo nor not nov nrb nri nrk nrn nro nrr nrt nrv ntb nti ntk ntn nto ntr ntt ntv nvb nvi nvk nvn nvt nvv o-i ob- obb obi obk obn obo obr obt obv oib oii oik oin oio oir oit oiv okb oki okk oko okr on- onb oni onk onn ono onr ont oo- oob ooi ook oon ooo oor oot oov or- orb ori ork orn oro orr ort orv ot- otb oti otk otn oto otr ott otv ov- ovb ovi ovo ovv rbb rbi rbk rbn rbo rbr rbt rib rii rik rin rio rir rit riv rkb rkk rko rkt rkv rnb rni rnn rno rnr rnt rnv rob roi rok ron roo ror rot rov rrb rri rrk rrn rrr rrt rtb rti rtk rtn rto rtr rtt rtv rvb rvi rvn rvo rvr rvt rvv tbb tbi tbk tbn tbo tbr tbt tbv tib tii tik tin tio tir tit tiv tkb tkk tko tkr tkt tnb tni tnk tnn tno tnr tnt to- tob toi tok ton too tor tot tov trb tri trk trn tro trr trt trv ttb tti ttk ttn tto ttr ttt ttv tvb tvi tvk tvn tvo tvr tvt vbi vbk vbo vbr vbv vi- vib vii vik vin vio vir vit viv vkb vkt vn- vni vno vnr vnv vob voi vok von voo vor vot vov vrb vri vrk vrn vrr vrt vtb vti vtk vto vtr vtt vtv vvb vvi vvo vvr vvt vvv