-ic a-a a-b a-c a-i a-t aaa aab aac aai aan aas aat aay ab- aba abb abc abi abn abs abt aby ac- aca acb acc aci acn acs act acy ai- aia aib aic aii ain ais ait aiy an- ana anb anc ani ann ans ant any as- asa asb asc asi asn ass ast asy at- ata atb atc ati atn ats att ay- aya ayc ayi ayn ays ayt baa bab bac bai ban bas bat bay bba bbb bbc bbi bbn bbs bbt bby bca bcb bcc bci bcn bcs bct bcy bi- bia bib bic bii bin bis bit biy bna bnb bnc bni bnn bns bnt bsa bsb bsc bsi bsn bss bst bsy bta btb btc bti btn bts btt bty by- bya byc byi byn bys byt c-- caa cab cac cai can cas cat cay cba cbb cbc cbi cbn cbs cbt cby cca ccb ccc cci ccn ccs cct ci- cia cib cic cii cin cis cit cn- cna cnb cnc cni cnn cns cnt cny csa csb csc csi csn css cst csy cta ctb ctc cti ctn cts ctt cty cya cyb cyc cyn cys cyt ia- iaa iab iac iai ian ias iat iba ibb ibc ibi ibn ibs ibt iby ica icb icc ici icn ics ict icy iia iib iic iii iin iis iit in- ina inb inc ini inn ins int iny is- isa isb isc isi isn iss ist isy ita itb itc iti itn its itt ity iya iyc iys iyt iyy n-i naa nab nac nai nan nas nat nay nba nbb nbc nbi nbn nbs nbt nca ncb ncc nci ncn ncs nct nia nib nic nii nin nis nit nna nnb nnc nni nnn nns nnt nsa nsb nsc nsi nsn nss nst nsy nta ntb ntc nti ntn nts ntt nya nyc nyn nys nyt nyy saa sab sac sai san sas sat say sba sbb sbc sbi sbn sbs sbt sby sca scb scc sci scn scs sct sia sib sic sii sin sis sit sna snb snc sni snn sns snt sny ss- ssa ssb ssc ssi ssn sss sst sta stb stc sti stn sts stt sty sy- sya syb syc syi syn sys syt taa tab tac tai tan tas tat tay tba tbb tbc tbi tbn tbs tbt tca tcb tcc tci tcn tcs tct tia tib tic tii tin tis tit tiy tna tnb tnc tni tnn tns tnt tsa tsb tsc tsi tsn tss tst tsy tta ttb ttc tti ttn tts ttt tty tya tyc tyn tys tyt yaa yab yac yai yan yas yat yay ybc ybi ybs yby yca ycc yci ycs ycy yii yin yis yit yna ynn yns yny ysa ysb ysc ysi yss yst ysy yta ytc ytn yts ytt yyb yyc yys yyt yyy