-ic bbb bbc bbe bbi bbk bbl bbn bcb bcc bce bci bck bcl bcn be- beb bec bee bei bek bel ben bi- bib bic bie bii bik bil bin bkb bkc bke bkk bkl bkn blb blc ble bli blk bll bln bnb bnc bne bni bnk bnl bnn c-- cbb cbc cbe cbi cbk cbl cbn ccb ccc cce cci cck ccl ccn ce- ceb cec cee cei cek cel cen ci- cib cic cie cii cik cil cin ckb ckc cki cl- clb clc cle cli clk cll cln cn- cnb cnc cne cni cnl cnn ebb ebc ebe ebi ebk ebl ebn ec- ecb ecc ece eci eck ecl ecn eeb eec eee eek eel een eib eic eie eii eik eil ein ekb ekc eke eki ekl elb elc ele eli elk ell eln en- enb enc ene eni enk enl enn ibb ibc ibe ibi ibk ibl ibn icb icc ice ici ick icl icn ie- iec iee iei iek iel ien iib iic iie iii iil iin ikb ikc ike iki ikk ikl il- ilb ilc ile ili ilk ill iln in- inb inc ine ini ink inl inn kbb kbc kbe kbi kbk kbl kbn kcb kcc kce kci kck kcl kcn ke- keb kec kee kei kek kel ken kib kic kie kii kik kil kin kkb kkc kke kki kkk kkl kkn kl- klb klc kli kn- knc kne kni knk knl knn lbb lbc lbe lbi lbk lbl lcb lcc lce lci lck lcl lcn leb lec lee lei lek lel len lib lic lie lii lik lil lin lkb lkl llb llc lle lli llk lll lln lnb lnc lne lni lnk lnl lnn n-i nbb nbc nbe nbi nbk nbl nbn ncb ncc nce nci nck ncl ncn ne- neb nec nee nei nek nel nen nib nic nie nii nik nil nin nkc nke nki nkk nkn nlb nlc nle nli nlk nll nln nnb nnc nne nni nnk nnl nnn