-ey a-a a-b a-t aaa aab aae aan aas aat aay ab- aba abb abe abn abs abt aby aea aeb aee aen aes aet aey an- ana anb ane ann ans ant any as- asa asb ase asn ass ast asy at- ata atb ate atn ats att ay- aya aye ayn ays ayt baa bab bae ban bas bat bay bba bbb bbe bbn bbs bbt bby be- bea beb bee ben bes bet bey bna bnb bne bnn bns bnt bsa bsb bse bsn bss bst bsy bta btb bte btn bts btt bty by- bya bye byn bys byt eaa eab eae ean eas eat eba ebb ebe ebn ebs ebt eby eea eeb eee een ees eet eey en- ena enb ene enn ens ent eny es- esa esb ese esn ess est esy eta etb ete etn ets ett ety eya eye eyn eys eyt naa nab nae nan nas nat nay nba nbb nbe nbn nbs nbt ne- nea neb nee nen nes net ney nna nnb nne nnn nns nnt nsa nsb nse nsn nss nst nsy nta ntb nte ntn nts ntt nya nye nyn nys nyt nyy saa sab sae san sas sat say sba sbb sbe sbn sbs sbt sby se- sea seb see sen ses set sey sna snb sne snn sns snt sny ss- ssa ssb sse ssn sss sst sta stb ste stn sts stt sty sy- sya syb sye syn sys syt taa tab tae tan tas tat tay tba tbb tbe tbn tbs tbt te- tea teb tee ten tes tet tey tna tnb tne tnn tns tnt tsa tsb tse tsn tss tst tsy tta ttb tte ttn tts ttt tty tya tye tyn tys tyt yaa yab yae yan yas yat yay ybe ybs yby yea yeb yee yen yes yet yey yna yne ynn yns yny ysa ysb yse yss yst ysy yta yte ytn yts ytt yyb yye yys yyt yyy