-ic bbb bbc bbi bbk bbl bbn bbr bcb bcc bci bck bcl bcn bcr bi- bib bic bii bik bil bin bir bkb bkc bkk bkl bkn bkr blb blc bli blk bll bln blr bnb bnc bni bnk bnl bnn bnr brb bri brk brl brn brr c-- cbb cbc cbi cbk cbl cbn cbr ccb ccc cci cck ccl ccn ccr ci- cib cic cii cik cil cin cir ckb ckc cki cl- clb clc cli clk cll cln clr cn- cnb cnc cni cnl cnn cnr crb crc cri crk crl crn crr ibb ibc ibi ibk ibl ibn ibr icb icc ici ick icl icn icr iib iic iii iil iin iir ikb ikc iki ikk ikl ikr il- ilb ilc ili ilk ill iln ilr in- inb inc ini ink inl inn inr ir- irb irc iri irk irl irn irr kbb kbc kbi kbk kbl kbn kbr kcb kcc kci kck kcl kcn kcr kib kic kii kik kil kin kir kkb kkc kki kkk kkl kkn kkr kl- klb klc kli klr kn- knc kni knk knl knn knr krc kri krk krl krn krr lbb lbc lbi lbk lbl lbr lcb lcc lci lck lcl lcn lcr lib lic lii lik lil lin lir lkb lkl lkr llb llc lli llk lll lln llr lnb lnc lni lnk lnl lnn lnr lrb lrc lri lrk lrn lrr n-i nbb nbc nbi nbk nbl nbn nbr ncb ncc nci nck ncl ncn ncr nib nic nii nik nil nin nir nkc nki nkk nkn nkr nlb nlc nli nlk nll nln nlr nnb nnc nni nnk nnl nnn nrb nrc nri nrk nrl nrn nrr rbb rbc rbi rbk rbl rbn rbr rcb rcc rci rcl rcn rcr rib ric rii rik ril rin rir rkb rkc rkk rlc rli rll rln rlr rnb rnc rni rnn rnr rrb rrc rri rrk rrl rrn rrr