-ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aas aat ab- aba abb abc abe abi abm abs abt ac- aca acb acc ace aci acm acs act aea aeb aec aee aei aem aes aet ai- aia aib aic aie aii aim ais ait ama amb amc ame ami amm ams amt as- asa asb asc ase asi asm ass ast at- ata atb atc ate ati atm ats att baa bab bac bae bai bam bas bat bba bbb bbc bbe bbi bbm bbs bbt bca bcb bcc bce bci bcm bcs bct be- bea beb bec bee bei bem bes bet bi- bia bib bic bie bii bim bis bit bma bmb bmc bme bmi bmm bms bmt bsa bsb bsc bse bsi bsm bss bst bta btb btc bte bti btm bts btt c-- caa cab cac cae cai cam cas cat cba cbb cbc cbe cbi cbm cbs cbt cca ccb ccc cce cci ccm ccs cct ce- cea ceb cec cee cei cem ces cet ci- cia cib cic cie cii cim cis cit cma cmb cmc cme cmi cmm cms cmt csa csb csc cse csi csm css cst cta ctb ctc cte cti ctm cts ctt eaa eab eac eae eai eam eas eat eba ebb ebc ebe ebi ebm ebs ebt ec- eca ecb ecc ece eci ecm ecs ect eea eeb eec eee eem ees eet eia eib eic eie eii eim eis eit em- ema emb emc eme emi emm ems emt es- esa esb esc ese esi esm ess est eta etb etc ete eti etm ets ett ia- iaa iab iac iae iai iam ias iat iba ibb ibc ibe ibi ibm ibs ibt ica icb icc ice ici icm ics ict ie- iea iec iee iei iem ies iet iia iib iic iie iii iim iis iit im- ima imb imc ime imi imm ims imt is- isa isb isc ise isi ism iss ist ita itb itc ite iti itm its itt maa mab mac mae mai mam mas mat mba mbb mbc mbe mbi mbm mbs mbt mc- mca mcb mcc mce mci mcm mcs mct mea meb mec mee mei mem mes met mi- mia mib mic mie mii mim mis mit mma mmb mmc mme mmi mmm mms mmt msa msb msc mse msi msm mss mst mta mtb mtc mte mti mtm mts mtt saa sab sac sae sai sam sas sat sba sbb sbc sbe sbi sbm sbs sbt sca scb scc sce sci scm scs sct se- sea seb sec see sei sem ses set sia sib sic sie sii sim sis sit sma smb smc sme smi smm sms smt ss- ssa ssb ssc sse ssi ssm sss sst sta stb stc ste sti stm sts stt taa tab tac tae tai tam tas tat tba tbb tbc tbe tbi tbm tbs tbt tca tcb tcc tce tci tcm tcs tct te- tea teb tec tee tei tem tes tet tia tib tic tie tii tim tis tit tma tmb tmc tme tmi tmm tms tmt tsa tsb tsc tse tsi tsm tss tst tta ttb ttc tte tti ttm tts ttt