a-a a-b a-i a-t aaa aab aai aan aas aat aay ab- aba abb abi abn abs abt aby ai- aia aib aii ain ais ait aiy an- ana anb ani ann ans ant any as- asa asb asi asn ass ast asy at- ata atb ati atn ats att ay- aya ayi ayn ays ayt baa bab bai ban bas bat bay bba bbb bbi bbn bbs bbt bby bi- bia bib bii bin bis bit biy bna bnb bni bnn bns bnt bsa bsb bsi bsn bss bst bsy bta btb bti btn bts btt bty by- bya byi byn bys byt ia- iaa iab iai ian ias iat iba ibb ibi ibn ibs ibt iby iia iib iii iin iis iit in- ina inb ini inn ins int iny is- isa isb isi isn iss ist isy ita itb iti itn its itt ity iya iys iyt iyy n-i naa nab nai nan nas nat nay nba nbb nbi nbn nbs nbt nia nib nii nin nis nit nna nnb nni nnn nns nnt nsa nsb nsi nsn nss nst nsy nta ntb nti ntn nts ntt nya nyn nys nyt nyy saa sab sai san sas sat say sba sbb sbi sbn sbs sbt sby sia sib sii sin sis sit sna snb sni snn sns snt sny ss- ssa ssb ssi ssn sss sst sta stb sti stn sts stt sty sy- sya syb syi syn sys syt taa tab tai tan tas tat tay tba tbb tbi tbn tbs tbt tia tib tii tin tis tit tiy tna tnb tni tnn tns tnt tsa tsb tsi tsn tss tst tsy tta ttb tti ttn tts ttt tty tya tyn tys tyt yaa yab yai yan yas yat yay ybi ybs yby yii yin yis yit yna ynn yns yny ysa ysb ysi yss yst ysy yta ytn yts ytt yyb yys yyt yyy