-ol bbb bbi bbl bbn bbo bbr bbs bi- bib bii bil bin bio bir bis blb bli bll bln blo blr bls bnb bni bnl bnn bno bnr bns bob boi bol bon boo bor bos brb bri brl brn bro brr brs bsb bsi bsl bsn bso bsr bss ibb ibi ibl ibn ibo ibr ibs iib iii iil iin iio iir iis il- ilb ili ill iln ilo ilr ils in- inb ini inl inn ino inr ins io- iob ioi iol ion ioo ior ios ir- irb iri irl irn iro irr irs is- isb isi isl isn iso isr iss lbb lbi lbl lbo lbr lbs lib lii lil lin lio lir lis llb lli lll lln llo llr lls lnb lni lnl lnn lno lnr lns lob loi lol lon loo lor los lrb lri lrn lro lrr lrs lsb lsi lsl lsn lso lsr lss n-i nbb nbi nbl nbn nbo nbr nbs nib nii nil nin nio nir nis nlb nli nll nln nlo nlr nls nnb nni nnl nnn nno nns no- nob noi nol non noo nor nos nrb nri nrl nrn nro nrr nrs nsb nsi nsl nsn nso nsr nss o-i ob- obb obi obl obn obo obr obs oib oii oil oin oio oir ois olb oli oll oln olo ols on- onb oni onl onn ono onr ons oo- oob ooi ool oon ooo oor oos or- orb ori orl orn oro orr ors os- osb osi osl osn oso osr oss rbb rbi rbl rbn rbo rbr rbs rib rii ril rin rio rir ris rli rll rln rlo rlr rls rnb rni rnn rno rnr rns rob roi rol ron roo ror ros rrb rri rrl rrn rrr rrs rsb rsi rsl rsn rso rsr rss sbb sbi sbl sbn sbo sbr sbs sib sii sil sin sio sir sis slb sli sll sln slo slr sls snb sni snl snn sno snr sns sob soi sol son soo sor sos sr- srb sri srl srn sro srr srs ss- ssb ssi ssl ssn sso ssr sss