-ic b-u bbb bbc bbe bbi bbn bbs bbt bbu bcb bcc bce bci bcn bcs bct bcu be- beb bec bee bei ben bes bet beu bi- bib bic bie bii bin bis bit biu bnb bnc bne bni bnn bns bnt bnu bsb bsc bse bsi bsn bss bst bsu btb btc bte bti btn bts btt btu bub buc bue bui bun bus but buu c-- cbb cbc cbe cbi cbn cbs cbt cbu ccb ccc cce cci ccn ccs cct ccu ce- ceb cec cee cei cen ces cet ceu ci- cib cic cie cii cin cis cit ciu cn- cnb cnc cne cni cnn cns cnt cnu csb csc cse csi csn css cst csu ctb ctc cte cti ctn cts ctt ctu cub cuc cue cui cun cus cut cuu ebb ebc ebe ebi ebn ebs ebt ebu ec- ecb ecc ece eci ecn ecs ect ecu eeb eec eee een ees eet eib eic eie eii ein eis eit eiu en- enb enc ene eni enn ens ent enu es- esb esc ese esi esn ess est esu etb etc ete eti etn ets ett etu eu- eub euc eue eui eun eus eut ibb ibc ibe ibi ibn ibs ibt ibu icb icc ice ici icn ics ict icu ie- iec iee iei ien ies iet iib iic iie iii iin iis iit iiu in- inb inc ine ini inn ins int inu is- isb isc ise isi isn iss ist isu itb itc ite iti itn its itt itu iu- iub iuc iue iui ius iut n-i nbb nbc nbe nbi nbn nbs nbt nbu ncb ncc nce nci ncn ncs nct ncu ne- neb nec nee nei nen nes net neu nib nic nie nii nin nis nit niu nnb nnc nne nni nnn nns nnt nnu nsb nsc nse nsi nsn nss nst nsu ntb ntc nte nti ntn nts ntt ntu nub nuc nue nui nun nus nut nuu sbb sbc sbe sbi sbn sbs sbt sbu scb scc sce sci scn scs sct scu se- seb sec see sei sen ses set seu sib sic sie sii sin sis sit siu snb snc sne sni snn sns snt snu ss- ssb ssc sse ssi ssn sss sst ssu stb stc ste sti stn sts stt stu sub suc sue sui sun sus sut suu tbb tbc tbe tbi tbn tbs tbt tbu tcb tcc tce tci tcn tcs tct tcu te- teb tec tee tei ten tes tet teu tib tic tie tii tin tis tit tiu tnb tnc tne tni tnn tns tnt tsb tsc tse tsi tsn tss tst tsu ttb ttc tte tti ttn tts ttt ttu tub tuc tue tui tun tus tut tuu ubb ubc ube ubi ubn ubs ubt ubu ucb ucc uce uci ucn ucs uct ucu ueb uec uee uei uen ues uet uib uic uie uii uin uis uit uiu un- unb unc une uni unn uns unt unu usb usc use usi usn uss ust usu utb utc ute uti utn uts utt utu uuc uue uun uus uut uuu