-ey a-a a-b a-c aaa aab aac aae aah aau aay ab- aba abb abc abe abh abu aby ac- aca acb acc ace ach acu acy aea aeb aec aee aeh aeu aey aha ahb ahc ahe ahh ahu ahy au- aua aub auc aue auh ay- aya ayc aye ayh ayu b-u baa bab bac bae bah bau bay bba bbb bbc bbe bbh bbu bby bca bcb bcc bce bch bcu bcy be- bea beb bec bee beh beu bey bha bhb bhc bhe bhh bhu bua bub buc bue buh buu buy by- bya byc bye byh byu c-- caa cab cac cae cah cau cay cba cbb cbc cbe cbh cbu cby cca ccb ccc cce cch ccu ce- cea ceb cec cee ceh ceu cey ch- cha chb chc che chh chu chy cua cub cuc cue cuh cuu cuy cya cyb cyc cye eaa eab eac eae eah eau eba ebb ebc ebe ebh ebu eby ec- eca ecb ecc ece ech ecu eea eeb eec eee eey eha ehb ehc ehe ehh ehu eu- eua eub euc eue eya eyc eye haa hab hac hae hah hau hay hba hbb hbc hbe hbh hbu hby hca hcb hcc hce hch hcy he- hea heb hec hee heh heu hey hha hhb hhc hhe hhh hhu hhy hua hub huc hue huh huu huy hy- hya hyb hyc hye hyh hyy ua- uaa uab uac uae uah uau uay uba ubb ubc ube ubh ubu uby uca ucb ucc uce uch ucu uea ueb uec uee ueh uey uha uhb uhc uhe uhh uhu uhy uua uuc uue uuu uyc uyu yaa yab yac yae yah yau yay ybc ybe yby yca ycc yce ych ycu ycy yea yeb yec yee yeh yey yha yhc yhe yhu yua yue yuh yuu yuy yyb yyc yye yyu yyy