-ic bbb bbc bbe bbi bbk bbn bbs bbt bcb bcc bce bci bck bcn bcs bct be- beb bec bee bei bek ben bes bet bi- bib bic bie bii bik bin bis bit bkb bkc bke bkk bkn bks bkt bnb bnc bne bni bnk bnn bns bnt bsb bsc bse bsi bsk bsn bss bst btb btc bte bti btk btn bts btt c-- cbb cbc cbe cbi cbk cbn cbs cbt ccb ccc cce cci cck ccn ccs cct ce- ceb cec cee cei cek cen ces cet ci- cib cic cie cii cik cin cis cit ckb ckc cki cks ckt cn- cnb cnc cne cni cnn cns cnt csb csc cse csi csk csn css cst ctb ctc cte cti ctk ctn cts ctt ebb ebc ebe ebi ebk ebn ebs ebt ec- ecb ecc ece eci eck ecn ecs ect eeb eec eee eek een ees eet eib eic eie eii eik ein eis eit ekb ekc eke eki eks ekt en- enb enc ene eni enk enn ens ent es- esb esc ese esi esk esn ess est etb etc ete eti etk etn ets ett ibb ibc ibe ibi ibk ibn ibs ibt icb icc ice ici ick icn ics ict ie- iec iee iei iek ien ies iet iib iic iie iii iin iis iit ikb ikc ike iki ikk iks ikt in- inb inc ine ini ink inn ins int is- isb isc ise isi isk isn iss ist itb itc ite iti itk itn its itt k-t kbb kbc kbe kbi kbk kbn kbs kcb kcc kce kci kck kcn kcs kct ke- keb kec kee kei kek ken kes ket kib kic kie kii kik kin kis kit kkb kkc kke kki kkk kkn kks kkt kn- knc kne kni knk knn knt ksb ksc kse ksi ksk ksn kss kst ktb ktc kte ktk ktn kts ktt n-i nbb nbc nbe nbi nbk nbn nbs nbt ncb ncc nce nci nck ncn ncs nct ne- neb nec nee nei nek nen nes net nib nic nie nii nik nin nis nit nkc nke nki nkk nkn nks nkt nnb nnc nne nni nnk nnn nns nnt nsb nsc nse nsi nsk nsn nss nst ntb ntc nte nti ntk ntn nts ntt sbb sbc sbe sbi sbk sbn sbs sbt scb scc sce sci sck scn scs sct se- seb sec see sei sek sen ses set sib sic sie sii sik sin sis sit sk- skb skc ske ski skk sks skt snb snc sne sni snk snn sns snt ss- ssb ssc sse ssi ssk ssn sss sst stb stc ste sti stk stn sts stt tbb tbc tbe tbi tbk tbn tbs tbt tcb tcc tce tci tck tcn tcs tct te- teb tec tee tei tek ten tes tet tib tic tie tii tik tin tis tit tkb tkc tke tkk tks tkt tnb tnc tne tni tnk tnn tns tnt tsb tsc tse tsi tsk tsn tss tst ttb ttc tte tti ttk ttn tts ttt