-ic a-a a-b a-c a-i a-t aaa aab aac aai aam aas aat aay ab- aba abb abc abi abm abs abt aby ac- aca acb acc aci acm acs act acy ai- aia aib aic aii aim ais ait aiy ama amb amc ami amm ams amt amy as- asa asb asc asi asm ass ast asy at- ata atb atc ati atm ats att ay- aya ayc ayi ays ayt baa bab bac bai bam bas bat bay bba bbb bbc bbi bbm bbs bbt bby bca bcb bcc bci bcm bcs bct bcy bi- bia bib bic bii bim bis bit biy bma bmb bmc bmi bmm bms bmt bsa bsb bsc bsi bsm bss bst bsy bta btb btc bti btm bts btt bty by- bya byc byi bym bys byt c-- caa cab cac cai cam cas cat cay cba cbb cbc cbi cbm cbs cbt cby cca ccb ccc cci ccm ccs cct ci- cia cib cic cii cim cis cit cma cmb cmc cmi cmm cms cmt cmy csa csb csc csi csm css cst csy cta ctb ctc cti ctm cts ctt cty cya cyb cyc cym cys cyt ia- iaa iab iac iai iam ias iat iba ibb ibc ibi ibm ibs ibt iby ica icb icc ici icm ics ict icy iia iib iic iii iim iis iit im- ima imb imc imi imm ims imt imy is- isa isb isc isi ism iss ist isy ita itb itc iti itm its itt ity iya iyc iym iys iyt iyy maa mab mac mai mam mas mat may mba mbb mbc mbi mbm mbs mbt mc- mca mcb mcc mci mcm mcs mct mi- mia mib mic mii mim mis mit miy mma mmb mmc mmi mmm mms mmt msa msb msc msi msm mss mst msy mta mtb mtc mti mtm mts mtt my- mya myb myc mym mys myt saa sab sac sai sam sas sat say sba sbb sbc sbi sbm sbs sbt sby sca scb scc sci scm scs sct sia sib sic sii sim sis sit sma smb smc smi smm sms smt smy ss- ssa ssb ssc ssi ssm sss sst sta stb stc sti stm sts stt sty sy- sya syb syc syi sym sys syt taa tab tac tai tam tas tat tay tba tbb tbc tbi tbm tbs tbt tca tcb tcc tci tcm tcs tct tia tib tic tii tim tis tit tiy tma tmb tmc tmi tmm tms tmt tmy tsa tsb tsc tsi tsm tss tst tsy tta ttb ttc tti ttm tts ttt tty tya tyc tym tys tyt yaa yab yac yai yam yas yat yay ybc ybi ybm ybs yby yca ycc yci ycs ycy yii yim yis yit yma ymc ymi ymm yms ymt ysa ysb ysc ysi ysm yss yst ysy yta ytc ytm yts ytt yyb yyc yys yyt yyy