-ey a-a a-b a-c aaa aab aac aae aan aao aau aay ab- aba abb abc abe abn abo abu aby ac- aca acb acc ace acn aco acu acy aea aeb aec aee aen aeo aeu aey an- ana anb anc ane ann ano anu any aoa aob aoc aoe aon aoo aou au- aua aub auc aue aun auo ay- aya ayc aye ayn ayo ayu b-u baa bab bac bae ban bao bau bay bba bbb bbc bbe bbn bbo bbu bby bca bcb bcc bce bcn bco bcu bcy be- bea beb bec bee ben beo beu bey bna bnb bnc bne bnn bno bnu boa bob boc boe bon boo bou boy bua bub buc bue bun buo buu buy by- bya byc bye byn byo byu c-- caa cab cac cae can cao cau cay cba cbb cbc cbe cbn cbo cbu cby cca ccb ccc cce ccn cco ccu ce- cea ceb cec cee cen ceo ceu cey cn- cna cnb cnc cne cnn cno cnu cny co- coa cob coc coe con coo cou coy cua cub cuc cue cun cuo cuu cuy cya cyb cyc cye cyn cyo eaa eab eac eae ean eao eau eba ebb ebc ebe ebn ebo ebu eby ec- eca ecb ecc ece ecn eco ecu eea eeb eec eee een eeo eey en- ena enb enc ene enn eno enu eny eo- eoa eob eoc eoe eon eoo eou eu- eua eub euc eue eun eya eyc eye eyn eyo naa nab nac nae nan nao nau nay nba nbb nbc nbe nbn nbo nbu nca ncb ncc nce ncn nco ncu ne- nea neb nec nee nen neo neu ney nna nnb nnc nne nnn nno nnu no- noa nob noc noe non noo nou noy nua nub nuc nue nun nuo nuu nuy nya nyc nye nyn nyo nyu nyy oaa oab oac oae oan oao oau ob- oba obb obc obe obn obo obu oby oc- oca ocb occ ocn oco ocu oea oeb oec oee oen oeo oey on- ona onb onc one onn ono onu ony oo- ooa oob ooc oon ooo ou- oua ouc oue oun ouo oya oye oyo ua- uaa uab uac uae uan uao uau uay uba ubb ubc ube ubn ubo ubu uby uca ucb ucc uce ucn uco ucu uea ueb uec uee uen uey un- una unb unc une unn uno unu uny uoa uob uoc uoe uon uoo uua uuc uue uun uuu uyc uyo uyu yaa yab yac yae yan yao yau yay ybc ybe yby yca ycc yce yco ycu ycy yea yeb yec yee yen yeo yey yna yne ynn ynu yny yob yoc yoe yon yoo you yoy yua yue yun yuo yuu yuy yyb yyc yye yyu yyy