-ey -ic b-u bbb bbc bbe bbi bbn bbu bby bcb bcc bce bci bcn bcu bcy bcz be- beb bec bee bei ben beu bey bez bi- bib bic bie bii bin biu biy biz bnb bnc bne bni bnn bnu bnz bub buc bue bui bun buu buy buz by- byc bye byi byn byu byz bze bzn bzu bzz c-- cbb cbc cbe cbi cbn cbu cby cbz ccb ccc cce cci ccn ccu ccz ce- ceb cec cee cei cen ceu cey cez ci- cib cic cie cii cin ciu cn- cnb cnc cne cni cnn cnu cny cub cuc cue cui cun cuu cuy cuz cyb cyc cye cyn cz- czc cze ebb ebc ebe ebi ebn ebu eby ec- ecb ecc ece eci ecn ecu eeb eec eee een eey eib eic eie eii ein eiu en- enb enc ene eni enn enu eny enz eu- eub euc eue eui eun eyc eye eyn eze ezz ibb ibc ibe ibi ibn ibu iby ibz icb icc ice ici icn icu icy icz ie- iec iee iei ien iey iib iic iie iii iin iiu in- inb inc ine ini inn inu iny iu- iub iuc iue iui iuz iyc iye iyy ize izi izu izy izz n-i nbb nbc nbe nbi nbn nbu ncb ncc nce nci ncn ncu ne- neb nec nee nei nen neu ney nez nib nic nie nii nin niu niz nnb nnc nne nni nnn nnu nnz nub nuc nue nui nun nuu nuy nyc nye nyn nyu nyy nzb nze nzi nzz ubb ubc ube ubi ubn ubu uby ucb ucc uce uci ucn ucu ueb uec uee uei uen uey uib uic uie uii uin uiu un- unb unc une uni unn unu uny uuc uue uun uuu uyc uyi uyu uzb uzi uzu ybc ybe ybi yby ybz ycc yce yci ycu ycy yeb yec yee yei yen yey yez yie yii yin yiz yne ynn ynu yny yue yui yun yuu yuy yyb yyc yye yyu yyy yyz yzb yzu yzy zbb zbc zby zce zeb zec zee zen zez zib zie zin ziz znc zne znn zub zuc zui zun zuz zzy zzz