-er -ey b-u bbb bbe bbi bbn bbr bbt bbu bby be- beb bee bei ben ber bet beu bey bez bi- bib bie bii bin bir bit biu biy biz bnb bne bni bnn bnr bnt bnu bnz brb bre bri brn brr brt bru bry brz btb bte bti btn btr btt btu bty btz bub bue bui bun bur but buu buy buz by- bye byi byn byr byt byu byz bze bzn bzr bzu bzz ebb ebe ebi ebn ebr ebt ebu eby eeb eee een eer eet eey eib eie eii ein eir eit eiu en- enb ene eni enn enr ent enu eny enz erb ere eri ern err ert eru ery erz etb ete eti etn etr ett etu ety etz eu- eub eue eui eun eur eut eye eyn eyr eyt eze ezr ezz ibb ibe ibi ibn ibr ibt ibu iby ibz ie- iee iei ien ier iet iey iib iie iii iin iir iit iiu in- inb ine ini inn inr int inu iny ir- irb ire iri irn irr irt iru iry itb ite iti itn itt itu ity itz iu- iub iue iui iur iut iuz iye iyr iyt iyy ize izi izu izy izz n-i nbb nbe nbi nbn nbr nbt nbu ne- neb nee nei nen ner net neu ney nez nib nie nii nin nir nit niu niz nnb nne nni nnn nnt nnu nnz nrb nre nri nrn nrr nrt nru nry nrz ntb nte nti ntn ntr ntt ntu ntz nub nue nui nun nur nut nuu nuy nye nyn nyt nyu nyy nzb nze nzi nzz rbb rbe rbi rbn rbr rbt rbu re- reb ree rei ren rer ret reu rey rez rib rie rii rin rir rit riy riz rnb rni rnn rnr rnt rnu rny rnz rrb rri rrn rrr rrt rru rtb rte rti rtn rtr rtt rtu rty rtz rub rue rui run rur rut ruu ruy ruz ry- rye ryn ryr ryu ryy ryz rzb rze rzy tbb tbe tbi tbn tbr tbt tbu tbz te- teb tee tei ten ter tet teu tey tez tib tie tii tin tir tit tiu tiy tiz tnb tne tni tnn tnr tnt tnz trb tre tri trn trr trt tru try trz ttb tte tti ttn ttr ttt ttu tty tub tue tui tun tur tut tuu tuy tuz tye tyn tyr tyt tze tzu ubb ube ubi ubn ubr ubt ubu uby ueb uee uei uen uer uet uey uib uie uii uin uir uit uiu un- unb une uni unn unr unt unu uny ur- urb ure uri urn urr urt uru ury urz utb ute uti utn utr utt utu uty utz uue uun uur uut uuu uyi uyu uzb uzi uzu ybe ybi ybr yby ybz yeb yee yei yen yer yet yey yez yie yii yin yir yit yiz yne ynn ynu yny yre yrn yrt yru yte ytn ytr ytt ytu yue yui yun yur yut yuu yuy yyb yye yyt yyu yyy yyz yzb yzr yzu yzy zbb zbr zbt zby zeb zee zen zer zet zez zib zie zin zir zit ziz zne znn zte ztr zub zui zun zur zut zuz zzr zzt zzy zzz