-er -ey a-a a-b a-c aaa aab aac aae aan aao aar aau aay ab- aba abb abc abe abn abo abr abu aby ac- aca acb acc ace acn aco acr acu acy aea aeb aec aee aen aeo aer aeu aey an- ana anb anc ane ann ano anr anu any aoa aob aoc aoe aon aoo aor aou ar- ara arb arc are arn aro arr aru ary au- aua aub auc aue aun auo aur ay- aya ayc aye ayn ayo ayr ayu b-u baa bab bac bae ban bao bar bau bay bba bbb bbc bbe bbn bbo bbr bbu bby bca bcb bcc bce bcn bco bcr bcu bcy be- bea beb bec bee ben beo ber beu bey bna bnb bnc bne bnn bno bnr bnu boa bob boc boe bon boo bor bou boy bra brb bre brn bro brr bru bry bua bub buc bue bun buo bur buu buy by- bya byc bye byn byo byr byu c-- caa cab cac cae can cao car cau cay cba cbb cbc cbe cbn cbo cbr cbu cby cca ccb ccc cce ccn cco ccr ccu ce- cea ceb cec cee cen ceo cer ceu cey cn- cna cnb cnc cne cnn cno cnr cnu cny co- coa cob coc coe con coo cor cou coy cra crb crc cre crn cro crr cru cry cua cub cuc cue cun cuo cur cuu cuy cya cyb cyc cye cyn cyo cyr eaa eab eac eae ean eao ear eau eba ebb ebc ebe ebn ebo ebr ebu eby ec- eca ecb ecc ece ecn eco ecr ecu eea eeb eec eee een eeo eer eey en- ena enb enc ene enn eno enr enu eny eo- eoa eob eoc eoe eon eoo eor eou era erb erc ere ern ero err eru ery eu- eua eub euc eue eun eur eya eyc eye eyn eyo eyr naa nab nac nae nan nao nar nau nay nba nbb nbc nbe nbn nbo nbr nbu nca ncb ncc nce ncn nco ncr ncu ne- nea neb nec nee nen neo ner neu ney nna nnb nnc nne nnn nno nnu no- noa nob noc noe non noo nor nou noy nra nrb nrc nre nrn nro nrr nru nry nua nub nuc nue nun nuo nur nuu nuy nya nyc nye nyn nyo nyu nyy oaa oab oac oae oan oao oar oau ob- oba obb obc obe obn obo obr obu oby oc- oca ocb occ ocn oco ocr ocu oea oeb oec oee oen oeo oer oey on- ona onb onc one onn ono onr onu ony oo- ooa oob ooc oon ooo oor or- ora orb orc ore orn oro orr oru ory ou- oua ouc oue oun ouo our oya oye oyo ra- raa rab rac rae ran rao rar rau ray rba rbb rbc rbe rbn rbo rbr rbu rca rcb rcc rce rcn rco rcr rcu re- rea reb rec ree ren reo rer reu rey rna rnb rnc rnn rno rnr rnu rny roa rob roc roe ron roo ror rou roy rra rrb rrc rrn rrr rru rua rub ruc rue run ruo rur ruu ruy ry- rya ryc rye ryn ryo ryr ryu ryy ua- uaa uab uac uae uan uao uar uau uay uba ubb ubc ube ubn ubo ubr ubu uby uca ucb ucc uce ucn uco ucr ucu uea ueb uec uee uen uer uey un- una unb unc une unn uno unr unu uny uoa uob uoc uoe uon uoo uor ur- ura urb urc ure urn uro urr uru ury uua uuc uue uun uur uuu uyc uyo uyu yaa yab yac yae yan yao yar yau yay ybc ybe ybr yby yca ycc yce yco ycu ycy yea yeb yec yee yen yeo yer yey yna yne ynn ynu yny yob yoc yoe yon yoo yor you yoy yra yrc yre yrn yro yru yua yue yun yuo yur yuu yuy yyb yyc yye yyu yyy