bbb bbi bbk bbn bbo bbr bbt bi- bib bii bik bin bio bir bit bkb bkk bkn bko bkr bkt bnb bni bnk bnn bno bnr bnt bob boi bok bon boo bor bot brb bri brk brn bro brr brt btb bti btk btn bto btr btt ibb ibi ibk ibn ibo ibr ibt iib iii iin iio iir iit ikb iki ikk iko ikr ikt in- inb ini ink inn ino inr int io- iob ioi ion ioo ior iot ir- irb iri irk irn iro irr irt itb iti itk itn ito itt k-t kbb kbi kbk kbn kbo kbr kib kii kik kin kio kir kit kkb kki kkk kkn kkr kkt kn- kni knk knn kno knr knt kob koi kok kon koo kor kot kri krk krn kro krr krt ktb ktk ktn kto ktr ktt n-i nbb nbi nbk nbn nbo nbr nbt nib nii nik nin nio nir nit nki nkk nkn nko nkr nkt nnb nni nnk nnn nno nnt no- nob noi nok non noo nor not nrb nri nrk nrn nro nrr nrt ntb nti ntk ntn nto ntr ntt o-i ob- obb obi obk obn obo obr obt oib oii oik oin oio oir oit okb oki okk oko okr on- onb oni onk onn ono onr ont oo- oob ooi ook oon ooo oor oot or- orb ori ork orn oro orr ort ot- otb oti otk otn oto otr ott rbb rbi rbk rbn rbo rbr rbt rib rii rik rin rio rir rit rkb rkk rko rkt rnb rni rnn rno rnr rnt rob roi rok ron roo ror rot rrb rri rrk rrn rrr rrt rtb rti rtk rtn rto rtr rtt tbb tbi tbk tbn tbo tbr tbt tib tii tik tin tio tir tit tkb tkk tko tkr tkt tnb tni tnk tnn tno tnr tnt to- tob toi tok ton too tor tot trb tri trk trn tro trr trt ttb tti ttk ttn tto ttr ttt