-ic a-a a-b a-c a-i a-t aaa aab aac aad aai aas aat aay ab- aba abb abc abd abi abs abt aby ac- aca acb acc acd aci acs act acy ad- ada adb adc add adi ads adt ady ai- aia aib aic aid aii ais ait aiy as- asa asb asc asd asi ass ast asy at- ata atb atc atd ati ats att ay- aya ayc ayd ayi ays ayt baa bab bac bad bai bas bat bay bba bbb bbc bbd bbi bbs bbt bby bca bcb bcc bcd bci bcs bct bcy bda bdb bdc bdd bdi bds bdt bdy bi- bia bib bic bid bii bis bit biy bsa bsb bsc bsd bsi bss bst bsy bta btb btc btd bti bts btt bty by- bya byc byd byi bys byt c-- caa cab cac cad cai cas cat cay cba cbb cbc cbd cbi cbs cbt cby cca ccb ccc ccd cci ccs cct cda cdb cdc cdd cdi cds cdt cdy ci- cia cib cic cid cii cis cit csa csb csc csd csi css cst csy cta ctb ctc ctd cti cts ctt cty cya cyb cyc cyd cys cyt daa dab dac dad dai das dat day dba dbb dbc dbd dbi dbs dbt dby dca dcb dcc dcd dci dcs dct dda ddb ddc ddd ddi dds ddt ddy di- dia dib dic did dii dis dit diy dsa dsb dsc dsd dsi dss dst dsy dta dtb dtc dtd dti dts dtt dty dy- dya dyb dyc dyd dys dyy i-d ia- iaa iab iac iad iai ias iat iba ibb ibc ibd ibi ibs ibt iby ica icb icc icd ici ics ict icy ida idb idc idd idi ids idt idy iia iib iic iid iii iis iit is- isa isb isc isd isi iss ist isy ita itb itc itd iti its itt ity iya iyc iys iyt iyy saa sab sac sad sai sas sat say sba sbb sbc sbd sbi sbs sbt sby sca scb scc scd sci scs sct sda sdb sdc sdd sdi sds sdt sdy sia sib sic sid sii sis sit ss- ssa ssb ssc ssd ssi sss sst sta stb stc std sti sts stt sty sy- sya syb syc syd syi sys syt taa tab tac tad tai tas tat tay tba tbb tbc tbd tbi tbs tbt tca tcb tcc tcd tci tcs tct tda tdb tdc tdd tdi tds tdt tdy tia tib tic tid tii tis tit tiy tsa tsb tsc tsd tsi tss tst tsy tta ttb ttc ttd tti tts ttt tty tya tyc tyd tys tyt yaa yab yac yad yai yas yat yay ybc ybi ybs yby yca ycc ycd yci ycs ycy yda yds ydt ydy yid yii yis yit ysa ysb ysc ysi yss yst ysy yta ytc ytd yts ytt yyb yyc yys yyt yyy