-ol bbb bbi bbk bbl bbn bbo bbr bbt bi- bib bii bik bil bin bio bir bit bkb bkk bkl bkn bko bkr bkt blb bli blk bll bln blo blr blt bnb bni bnk bnl bnn bno bnr bnt bob boi bok bol bon boo bor bot brb bri brk brl brn bro brr brt btb bti btk btl btn bto btr btt ibb ibi ibk ibl ibn ibo ibr ibt iib iii iil iin iio iir iit ikb iki ikk ikl iko ikr ikt il- ilb ili ilk ill iln ilo ilr ilt in- inb ini ink inl inn ino inr int io- iob ioi iol ion ioo ior iot ir- irb iri irk irl irn iro irr irt itb iti itk itl itn ito itt k-t kbb kbi kbk kbl kbn kbo kbr kib kii kik kil kin kio kir kit kkb kki kkk kkl kkn kkr kkt kl- klb kli klo klr klt kn- kni knk knl knn kno knr knt kob koi kok kol kon koo kor kot kri krk krl krn kro krr krt ktb ktk ktl ktn kto ktr ktt lbb lbi lbk lbl lbo lbr lbt lib lii lik lil lin lio lir lit lkb lkl lkr lkt llb lli llk lll lln llo llr llt lnb lni lnk lnl lnn lno lnr lnt lob loi lok lol lon loo lor lot lrb lri lrk lrn lro lrr lrt ltb lti ltk ltl lto ltr ltt n-i nbb nbi nbk nbl nbn nbo nbr nbt nib nii nik nil nin nio nir nit nki nkk nkn nko nkr nkt nlb nli nlk nll nln nlo nlr nlt nnb nni nnk nnl nnn nno nnt no- nob noi nok nol non noo nor not nrb nri nrk nrl nrn nro nrr nrt ntb nti ntk ntn nto ntr ntt o-i ob- obb obi obk obl obn obo obr obt oib oii oik oil oin oio oir oit okb oki okk okl oko okr olb oli olk oll oln olo olt on- onb oni onk onl onn ono onr ont oo- oob ooi ook ool oon ooo oor oot or- orb ori ork orl orn oro orr ort ot- otb oti otk otl otn oto otr ott rbb rbi rbk rbl rbn rbo rbr rbt rib rii rik ril rin rio rir rit rkb rkk rko rkt rli rll rln rlo rlr rlt rnb rni rnn rno rnr rnt rob roi rok rol ron roo ror rot rrb rri rrk rrl rrn rrr rrt rtb rti rtk rtl rtn rto rtr rtt tbb tbi tbk tbl tbn tbo tbr tbt tib tii tik til tin tio tir tit tkb tkk tkl tko tkr tkt tli tlk tll tln tlo tlr tlt tnb tni tnk tnl tnn tno tnr tnt to- tob toi tok tol ton too tor tot trb tri trk trl trn tro trr trt ttb tti ttk ttl ttn tto ttr ttt