-er -ey a-a a-b aaa aab aae aaf aar aas aau aay ab- aba abb abe abf abr abs abu aby aea aeb aee aef aer aes aeu aey af- afa afb afe aff afr afs afu afy ar- ara arb are arf arr ars aru ary as- asa asb ase asf asr ass asu asy au- aua aub aue auf aur aus ay- aya aye ayf ayr ays ayu b-u baa bab bae baf bar bas bau bay bba bbb bbe bbf bbr bbs bbu bby be- bea beb bee bef ber bes beu bey bfa bfb bfe bff bfr bfs bfu bfy bra brb bre brf brr brs bru bry bsa bsb bse bsf bsr bss bsu bsy bua bub bue buf bur bus buu buy by- bya bye byf byr bys byu eaa eab eae eaf ear eas eau eba ebb ebe ebf ebr ebs ebu eby eea eeb eee eef eer ees eey ef- efa efb efe eff efr efs era erb ere erf err ers eru ery es- esa esb ese esf esr ess esu esy eu- eua eub eue euf eur eus eya eye eyr eys faa fab fae faf far fas fau fay fba fbb fbe fbf fbr fbs fbu fea feb fee fef fer fes feu fey ffa ffe fff ffr ffs ffu ffy fra frb fre frf frr frs fru fry fsa fsb fse fsf fsr fss fsu fua fub fue fuf fur fus fuu fy- fya fyb fye ra- raa rab rae raf rar ras rau ray rba rbb rbe rbf rbr rbs rbu re- rea reb ree ref rer res reu rey rfa rfb rfe rff rfr rfs rfu rra rrb rrf rrr rrs rru rsa rsb rse rsf rsr rss rsu rua rub rue ruf rur rus ruu ruy ry- rya rye ryf ryr rys ryu ryy saa sab sae saf sar sas sau say sba sbb sbe sbf sbr sbs sbu sby se- sea seb see sef ser ses seu sey sfa sfb sfe sff sfr sfs sfu sr- sra srb sre srf srr srs sry ss- ssa ssb sse ssf ssr sss ssu sua sub sue suf sur sus suu suy sy- sya syb sye syr sys syu ua- uaa uab uae uaf uar uas uau uay uba ubb ube ubf ubr ubs ubu uby uea ueb uee uef uer ues uey ufa ufe uff ufr ufs ufu ur- ura urb ure urf urr urs uru ury usa usb use usf usr uss usu uua uue uur uus uuu uys uyu yaa yab yae yaf yar yas yau yay ybe ybf ybr ybs yby yea yeb yee yef yer yes yey yfa yfe yff yfr yfs yfu yra yre yrf yrs yru ysa ysb yse ysr yss ysu ysy yua yue yur yus yuu yuy yyb yye yyf yys yyu yyy