-ey a-a a-b a-c aaa aab aac aae aam aau aay ab- aba abb abc abe abm abu aby ac- aca acb acc ace acm acu acy aea aeb aec aee aem aeu aey ama amb amc ame amm amu amy au- aua aub auc aue aum ay- aya ayc aye ayu b-u baa bab bac bae bam bau bay bba bbb bbc bbe bbm bbu bby bca bcb bcc bce bcm bcu bcy be- bea beb bec bee bem beu bey bma bmb bmc bme bmm bmu bua bub buc bue bum buu buy by- bya byc bye bym byu c-- caa cab cac cae cam cau cay cba cbb cbc cbe cbm cbu cby cca ccb ccc cce ccm ccu ce- cea ceb cec cee cem ceu cey cma cmb cmc cme cmm cmu cmy cua cub cuc cue cum cuu cuy cya cyb cyc cye cym eaa eab eac eae eam eau eba ebb ebc ebe ebm ebu eby ec- eca ecb ecc ece ecm ecu eea eeb eec eee eem eey em- ema emb emc eme emm emu eu- eua eub euc eue eya eyc eye eym maa mab mac mae mam mau may mba mbb mbc mbe mbm mbu mc- mca mcb mcc mce mcm mcu mea meb mec mee mem meu mey mma mmb mmc mme mmm mmu mua mub muc mue mum muu muy my- mya myb myc mye mym myu ua- uaa uab uac uae uam uau uay uba ubb ubc ube ubu uby uca ucb ucc uce ucm ucu uea ueb uec uee uem uey um- uma umb umc ume umm umu uua uuc uue uum uuu uyc uyu yaa yab yac yae yam yau yay ybc ybe ybm yby yca ycc yce ycu ycy yea yeb yec yee yem yey yma ymc yme ymm yua yue yum yuu yuy yyb yyc yye yyu yyy