-ol bbb bbi bbk bbl bbn bbo bbs bi- bib bii bik bil bin bio bis bkb bkk bkl bkn bko bks blb bli blk bll bln blo bls bnb bni bnk bnl bnn bno bns bob boi bok bol bon boo bos bsb bsi bsk bsl bsn bso bss ibb ibi ibk ibl ibn ibo ibs iib iii iil iin iio iis ikb iki ikk ikl iko iks il- ilb ili ilk ill iln ilo ils in- inb ini ink inl inn ino ins io- iob ioi iol ion ioo ios is- isb isi isk isl isn iso iss kbb kbi kbk kbl kbn kbo kbs kib kii kik kil kin kio kis kkb kki kkk kkl kkn kks kl- klb kli klo kls kn- kni knk knl knn kno kob koi kok kol kon koo kos ksb ksi ksk ksl ksn kso kss lbb lbi lbk lbl lbo lbs lib lii lik lil lin lio lis lkb lkl lks llb lli llk lll lln llo lls lnb lni lnk lnl lnn lno lns lob loi lok lol lon loo los lsb lsi lsk lsl lsn lso lss n-i nbb nbi nbk nbl nbn nbo nbs nib nii nik nil nin nio nis nki nkk nkn nko nks nlb nli nlk nll nln nlo nls nnb nni nnk nnl nnn nno nns no- nob noi nok nol non noo nos nsb nsi nsk nsl nsn nso nss o-i ob- obb obi obk obl obn obo obs oib oii oik oil oin oio ois okb oki okk okl oko oks olb oli olk oll oln olo ols on- onb oni onk onl onn ono ons oo- oob ooi ook ool oon ooo oos os- osb osi osk osl osn oso oss sbb sbi sbk sbl sbn sbo sbs sib sii sik sil sin sio sis sk- skb ski skk skl sko sks slb sli slk sll sln slo sls snb sni snk snl snn sno sns sob soi sok sol son soo sos ss- ssb ssi ssk ssl ssn sso sss