a-a a-b a-i a-t aaa aab aae aai aam aas aat ab- aba abb abe abi abm abs abt aea aeb aee aei aem aes aet ai- aia aib aie aii aim ais ait ama amb ame ami amm ams amt as- asa asb ase asi asm ass ast at- ata atb ate ati atm ats att baa bab bae bai bam bas bat bba bbb bbe bbi bbm bbs bbt be- bea beb bee bei bem bes bet bi- bia bib bie bii bim bis bit bma bmb bme bmi bmm bms bmt bsa bsb bse bsi bsm bss bst bta btb bte bti btm bts btt eaa eab eae eai eam eas eat eba ebb ebe ebi ebm ebs ebt eea eeb eee eem ees eet eia eib eie eii eim eis eit em- ema emb eme emi emm ems emt es- esa esb ese esi esm ess est eta etb ete eti etm ets ett ia- iaa iab iae iai iam ias iat iba ibb ibe ibi ibm ibs ibt ie- iea iee iei iem ies iet iia iib iie iii iim iis iit im- ima imb ime imi imm ims imt is- isa isb ise isi ism iss ist ita itb ite iti itm its itt maa mab mae mai mam mas mat mba mbb mbe mbi mbm mbs mbt mea meb mee mei mem mes met mi- mia mib mie mii mim mis mit mma mmb mme mmi mmm mms mmt msa msb mse msi msm mss mst mta mtb mte mti mtm mts mtt saa sab sae sai sam sas sat sba sbb sbe sbi sbm sbs sbt se- sea seb see sei sem ses set sia sib sie sii sim sis sit sma smb sme smi smm sms smt ss- ssa ssb sse ssi ssm sss sst sta stb ste sti stm sts stt taa tab tae tai tam tas tat tba tbb tbe tbi tbm tbs tbt te- tea teb tee tei tem tes tet tia tib tie tii tim tis tit tma tmb tme tmi tmm tms tmt tsa tsb tse tsi tsm tss tst tta ttb tte tti ttm tts ttt