-ey a-a a-b aaa aab aae aaf aas aau aay ab- aba abb abe abf abs abu aby aea aeb aee aef aes aeu aey af- afa afb afe aff afs afu afy as- asa asb ase asf ass asu asy au- aua aub aue auf aus ay- aya aye ayf ays ayu b-u baa bab bae baf bas bau bay bba bbb bbe bbf bbs bbu bby be- bea beb bee bef bes beu bey bfa bfb bfe bff bfs bfu bfy bsa bsb bse bsf bss bsu bsy bua bub bue buf bus buu buy by- bya bye byf bys byu eaa eab eae eaf eas eau eba ebb ebe ebf ebs ebu eby eea eeb eee eef ees eey ef- efa efb efe eff efs es- esa esb ese esf ess esu esy eu- eua eub eue euf eus eya eye eys faa fab fae faf fas fau fay fba fbb fbe fbf fbs fbu fea feb fee fef fes feu fey ffa ffe fff ffs ffu ffy fsa fsb fse fsf fss fsu fua fub fue fuf fus fuu fy- fya fyb fye saa sab sae saf sas sau say sba sbb sbe sbf sbs sbu sby se- sea seb see sef ses seu sey sfa sfb sfe sff sfs sfu ss- ssa ssb sse ssf sss ssu sua sub sue suf sus suu suy sy- sya syb sye sys syu ua- uaa uab uae uaf uas uau uay uba ubb ube ubf ubs ubu uby uea ueb uee uef ues uey ufa ufe uff ufs ufu usa usb use usf uss usu uua uue uus uuu uys uyu yaa yab yae yaf yas yau yay ybe ybf ybs yby yea yeb yee yef yes yey yfa yfe yff yfs yfu ysa ysb yse yss ysu ysy yua yue yus yuu yuy yyb yye yyf yys yyu yyy