-ey a-a a-b a-t aaa aab aae aas aat aay ab- aba abb abe abs abt aby aea aeb aee aes aet aey as- asa asb ase ass ast asy at- ata atb ate ats att ay- aya aye ays ayt baa bab bae bas bat bay bba bbb bbe bbs bbt bby be- bea beb bee bes bet bey bsa bsb bse bss bst bsy bta btb bte bts btt bty by- bya bye bys byt eaa eab eae eas eat eba ebb ebe ebs ebt eby eea eeb eee ees eet eey es- esa esb ese ess est esy eta etb ete ets ett ety eya eye eys eyt saa sab sae sas sat say sba sbb sbe sbs sbt sby se- sea seb see ses set sey ss- ssa ssb sse sss sst sta stb ste sts stt sty sy- sya syb sye sys syt taa tab tae tas tat tay tba tbb tbe tbs tbt te- tea teb tee tes tet tey tsa tsb tse tss tst tsy tta ttb tte tts ttt tty tya tye tys tyt yaa yab yae yas yat yay ybe ybs yby yea yeb yee yes yet yey ysa ysb yse yss yst ysy yta yte yts ytt yyb yye yys yyt yyy