-er -ey b-u bbb bbc bbe bbk bbn bbr bbu bby bcb bcc bce bck bcn bcr bcu bcy be- beb bec bee bek ben ber beu bey bkb bkc bke bkk bkn bkr bnb bnc bne bnk bnn bnr bnu brb bre brk brn brr bru bry bub buc bue buk bun bur buu buy by- byc bye byk byn byr byu c-- cbb cbc cbe cbk cbn cbr cbu cby ccb ccc cce cck ccn ccr ccu ce- ceb cec cee cek cen cer ceu cey ckb ckc cky cn- cnb cnc cne cnn cnr cnu cny crb crc cre crk crn crr cru cry cub cuc cue cuk cun cur cuu cuy cyb cyc cye cyk cyn cyr ebb ebc ebe ebk ebn ebr ebu eby ec- ecb ecc ece eck ecn ecr ecu eeb eec eee eek een eer eey ekb ekc eke ekr eku eky en- enb enc ene enk enn enr enu eny erb erc ere erk ern err eru ery eu- eub euc eue eun eur eyc eye eyn eyr kbb kbc kbe kbk kbn kbr kbu kcb kcc kce kck kcn kcr kcu ke- keb kec kee kek ken ker key kkb kkc kke kkk kkn kkr kku kky kn- knc kne knk knn knr knu krc krk krn krr kru kry kub kuc kue kuk kun kur kuu kuy kyc kye kyn kyr kyu nbb nbc nbe nbk nbn nbr nbu ncb ncc nce nck ncn ncr ncu ne- neb nec nee nek nen ner neu ney nkc nke nkk nkn nkr nku nky nnb nnc nne nnk nnn nnu nrb nrc nre nrk nrn nrr nru nry nub nuc nue nuk nun nur nuu nuy nyc nye nyk nyn nyu nyy rbb rbc rbe rbk rbn rbr rbu rcb rcc rce rcn rcr rcu re- reb rec ree rek ren rer reu rey rkb rkc rke rkk rku rky rnb rnc rnn rnr rnu rny rrb rrc rrk rrn rrr rru rub ruc rue ruk run rur ruu ruy ry- ryc rye ryk ryn ryr ryu ryy ubb ubc ube ubk ubn ubr ubu uby ucb ucc uce uck ucn ucr ucu ueb uec uee uen uer uey ukb ukc uke ukk ukn ukr uku un- unb unc une unk unn unr unu uny ur- urb urc ure urk urn urr uru ury uuc uue uun uur uuu uyc uyu ybc ybe ybr yby ycc yce ycu ycy yeb yec yee yek yen yer yey ykk ykn yne ynk ynn ynu yny yrc yre yrn yru yue yuk yun yur yuu yuy yyb yyc yye yyu yyy