-ic bbb bbc bbe bbf bbi bbn bbs bcb bcc bce bcf bci bcn bcs be- beb bec bee bef bei ben bes bfb bfc bfe bff bfi bfn bfs bi- bib bic bie bif bii bin bis bnb bnc bne bnf bni bnn bns bsb bsc bse bsf bsi bsn bss c-- cbb cbc cbe cbf cbi cbn cbs ccb ccc cce ccf cci ccn ccs ce- ceb cec cee cef cei cen ces cfb cfc cfe cff cfi cfn cfs ci- cib cic cie cif cii cin cis cn- cnb cnc cne cnf cni cnn cns csb csc cse csf csi csn css ebb ebc ebe ebf ebi ebn ebs ec- ecb ecc ece ecf eci ecn ecs eeb eec eee eef een ees ef- efb efc efe eff efi efs eib eic eie eif eii ein eis en- enb enc ene enf eni enn ens es- esb esc ese esf esi esn ess fbb fbc fbe fbf fbi fbn fbs fcb fcc fce fcf fci fcn fcs feb fec fee fef fei fen fes ffc ffe fff ffi ffn ffs fib fic fie fif fii fin fis fnb fnc fne fnf fni fnn fns fsb fsc fse fsf fsi fsn fss i-f ibb ibc ibe ibf ibi ibn ibs icb icc ice icf ici icn ics ie- iec iee ief iei ien ies ifb ifc ife iff ifi ifn ifs iib iic iie iif iii iin iis in- inb inc ine inf ini inn ins is- isb isc ise isf isi isn iss n-i nbb nbc nbe nbf nbi nbn nbs ncb ncc nce ncf nci ncn ncs ne- neb nec nee nef nei nen nes nfb nfc nfe nff nfi nfn nfs nib nic nie nif nii nin nis nnb nnc nne nnf nni nnn nns nsb nsc nse nsf nsi nsn nss sbb sbc sbe sbf sbi sbn sbs scb scc sce scf sci scn scs se- seb sec see sef sei sen ses sfb sfc sfe sff sfi sfn sfs sib sic sie sif sii sin sis snb snc sne snf sni snn sns ss- ssb ssc sse ssf ssi ssn sss