-ic bbb bbc bbi bbl bbn bcb bcc bci bcl bcn bi- bib bic bii bil bin blb blc bli bll bln bnb bnc bni bnl bnn c-- cbb cbc cbi cbl cbn ccb ccc cci ccl ccn ci- cib cic cii cil cin cl- clb clc cli cll cln cn- cnb cnc cni cnl cnn ibb ibc ibi ibl ibn icb icc ici icl icn iib iic iii iil iin il- ilb ilc ili ill iln in- inb inc ini inl inn lbb lbc lbi lbl lcb lcc lci lcl lcn lib lic lii lil lin llb llc lli lll lln lnb lnc lni lnl lnn n-i nbb nbc nbi nbl nbn ncb ncc nci ncl ncn nib nic nii nil nin nlb nlc nli nll nln nnb nnc nni nnl nnn