bbb bbf bbi bbk bbn bbo bbr bfb bff bfi bfn bfo bfr bi- bib bif bii bik bin bio bir bkb bkf bkk bkn bko bkr bnb bnf bni bnk bnn bno bnr bob bof boi bok bon boo bor brb brf bri brk brn bro brr fbb fbf fbi fbk fbn fbo fbr fff ffi ffk ffn ffo ffr fib fif fii fik fin fir fkb fkf fki fkk fnb fnf fni fnk fnn fnr fob fof foi fok fon foo for frb frf fri frk frn fro frr i-f ibb ibf ibi ibk ibn ibo ibr ifb iff ifi ifn ifo ifr iib iif iii iin iio iir ikb ikf iki ikk iko ikr in- inb inf ini ink inn ino inr io- iob iof ioi ion ioo ior ir- irb irf iri irk irn iro irr kbb kbf kbi kbk kbn kbo kbr kff kfi kfo kib kif kii kik kin kio kir kkb kki kkk kkn kkr kn- knf kni knk knn kno knr kob kof koi kok kon koo kor krf kri krk krn kro krr n-i nbb nbf nbi nbk nbn nbo nbr nfb nff nfi nfk nfn nfo nfr nib nif nii nik nin nio nir nkf nki nkk nkn nko nkr nnb nnf nni nnk nnn nno no- nob nof noi nok non noo nor nrb nrf nri nrk nrn nro nrr o-i ob- obb obf obi obk obn obo obr of- ofb off ofi ofn ofo ofr oib oif oii oik oin oio oir okb oki okk oko okr on- onb onf oni onk onn ono onr oo- oob oof ooi ook oon ooo oor or- orb orf ori ork orn oro orr rbb rbf rbi rbk rbn rbo rbr rfb rff rfi rfk rfn rfo rfr rib rif rii rik rin rio rir rkb rkf rkk rko rnb rni rnn rno rnr rob rof roi rok ron roo ror rrb rrf rri rrk rrn rrr