-ic b-u bbb bbc bbi bbn bbs bbt bbu bby bcb bcc bci bcn bcs bct bcu bcy bi- bib bic bii bin bis bit biu biy bnb bnc bni bnn bns bnt bnu bsb bsc bsi bsn bss bst bsu bsy btb btc bti btn bts btt btu bty bub buc bui bun bus but buu buy by- byc byi byn bys byt byu c-- cbb cbc cbi cbn cbs cbt cbu cby ccb ccc cci ccn ccs cct ccu ci- cib cic cii cin cis cit ciu cn- cnb cnc cni cnn cns cnt cnu cny csb csc csi csn css cst csu csy ctb ctc cti ctn cts ctt ctu cty cub cuc cui cun cus cut cuu cuy cyb cyc cyn cys cyt ibb ibc ibi ibn ibs ibt ibu iby icb icc ici icn ics ict icu icy iib iic iii iin iis iit iiu in- inb inc ini inn ins int inu iny is- isb isc isi isn iss ist isu isy itb itc iti itn its itt itu ity iu- iub iuc iui ius iut iyc iys iyt iyy n-i nbb nbc nbi nbn nbs nbt nbu ncb ncc nci ncn ncs nct ncu nib nic nii nin nis nit niu nnb nnc nni nnn nns nnt nnu nsb nsc nsi nsn nss nst nsu nsy ntb ntc nti ntn nts ntt ntu nub nuc nui nun nus nut nuu nuy nyc nyn nys nyt nyu nyy sbb sbc sbi sbn sbs sbt sbu sby scb scc sci scn scs sct scu sib sic sii sin sis sit siu snb snc sni snn sns snt snu sny ss- ssb ssc ssi ssn sss sst ssu stb stc sti stn sts stt stu sty sub suc sui sun sus sut suu suy sy- syb syc syi syn sys syt syu tbb tbc tbi tbn tbs tbt tbu tcb tcc tci tcn tcs tct tcu tib tic tii tin tis tit tiu tiy tnb tnc tni tnn tns tnt tsb tsc tsi tsn tss tst tsu tsy ttb ttc tti ttn tts ttt ttu tty tub tuc tui tun tus tut tuu tuy tyc tyn tys tyt ubb ubc ubi ubn ubs ubt ubu uby ucb ucc uci ucn ucs uct ucu uib uic uii uin uis uit uiu un- unb unc uni unn uns unt unu uny usb usc usi usn uss ust usu utb utc uti utn uts utt utu uty uuc uun uus uut uuu uyc uyi uys uyu ybc ybi ybs yby ycc yci ycs ycu ycy yii yin yis yit ynn yns ynu yny ysb ysc ysi yss yst ysu ysy ytc ytn yts ytt ytu yui yun yus yut yuu yuy yyb yyc yys yyt yyu yyy