a-a a-b a-i a-t aaa aab aae aag aai aam aas aat ab- aba abb abe abg abi abm abs abt aea aeb aee aeg aei aem aes aet ag- aga agb age agg agi agm ags agt ai- aia aib aie aig aii aim ais ait ama amb ame amg ami amm ams amt as- asa asb ase asg asi asm ass ast at- ata atb ate atg ati atm ats att baa bab bae bag bai bam bas bat bba bbb bbe bbg bbi bbm bbs bbt be- bea beb bee beg bei bem bes bet bga bgb bge bgg bgi bgm bgs bgt bi- bia bib bie big bii bim bis bit bma bmb bme bmg bmi bmm bms bmt bsa bsb bse bsg bsi bsm bss bst bta btb bte btg bti btm bts btt eaa eab eae eag eai eam eas eat eba ebb ebe ebg ebi ebm ebs ebt eea eeb eee eeg eem ees eet ega egb ege egg egi egm egs egt eia eib eie eig eii eim eis eit em- ema emb eme emg emi emm ems emt es- esa esb ese esg esi esm ess est eta etb ete etg eti etm ets ett gaa gab gae gag gai gam gas gat gba gbe gbg gbi gbm gbs gbt ge- gea geb gee geg gei gem ges get gga ggb ggg ggi ggm ggs ggt gia gib gie gig gii gim gis git gma gmb gme gmg gmi gmm gms gmt gsa gsb gse gsg gsi gsm gss gst gta gtb gte gtg gti gtm gts gtt ia- iaa iab iae iag iai iam ias iat iba ibb ibe ibg ibi ibm ibs ibt ie- iea iee ieg iei iem ies iet iga igb ige igg igi igm igs igt iia iib iie iii iim iis iit im- ima imb ime img imi imm ims imt is- isa isb ise isg isi ism iss ist ita itb ite itg iti itm its itt maa mab mae mag mai mam mas mat mba mbb mbe mbg mbi mbm mbs mbt mea meb mee meg mei mem mes met mga mgb mge mgi mgm mgs mgt mi- mia mib mie mig mii mim mis mit mma mmb mme mmg mmi mmm mms mmt msa msb mse msg msi msm mss mst mta mtb mte mtg mti mtm mts mtt saa sab sae sag sai sam sas sat sba sbb sbe sbg sbi sbm sbs sbt se- sea seb see seg sei sem ses set sga sgb sge sgg sgi sgm sgs sgt sia sib sie sig sii sim sis sit sma smb sme smg smi smm sms smt ss- ssa ssb sse ssg ssi ssm sss sst sta stb ste stg sti stm sts stt taa tab tae tag tai tam tas tat tba tbb tbe tbg tbi tbm tbs tbt te- tea teb tee teg tei tem tes tet tga tgb tge tgg tgi tgm tgs tgt tia tib tie tig tii tim tis tit tma tmb tme tmg tmi tmm tms tmt tsa tsb tse tsg tsi tsm tss tst tta ttb tte ttg tti ttm tts ttt