a-a a-b a-t aaa aab aae aag aam aas aat ab- aba abb abe abg abm abs abt aea aeb aee aeg aem aes aet ag- aga agb age agg agm ags agt ama amb ame amg amm ams amt as- asa asb ase asg asm ass ast at- ata atb ate atg atm ats att baa bab bae bag bam bas bat bba bbb bbe bbg bbm bbs bbt be- bea beb bee beg bem bes bet bga bgb bge bgg bgm bgs bgt bma bmb bme bmg bmm bms bmt bsa bsb bse bsg bsm bss bst bta btb bte btg btm bts btt eaa eab eae eag eam eas eat eba ebb ebe ebg ebm ebs ebt eea eeb eee eeg eem ees eet ega egb ege egg egm egs egt em- ema emb eme emg emm ems emt es- esa esb ese esg esm ess est eta etb ete etg etm ets ett gaa gab gae gag gam gas gat gba gbe gbg gbm gbs gbt ge- gea geb gee geg gem ges get gga ggb ggg ggm ggs ggt gma gmb gme gmg gmm gms gmt gsa gsb gse gsg gsm gss gst gta gtb gte gtg gtm gts gtt maa mab mae mag mam mas mat mba mbb mbe mbg mbm mbs mbt mea meb mee meg mem mes met mga mgb mge mgm mgs mgt mma mmb mme mmg mmm mms mmt msa msb mse msg msm mss mst mta mtb mte mtg mtm mts mtt saa sab sae sag sam sas sat sba sbb sbe sbg sbm sbs sbt se- sea seb see seg sem ses set sga sgb sge sgg sgm sgs sgt sma smb sme smg smm sms smt ss- ssa ssb sse ssg ssm sss sst sta stb ste stg stm sts stt taa tab tae tag tam tas tat tba tbb tbe tbg tbm tbs tbt te- tea teb tee teg tem tes tet tga tgb tge tgg tgm tgs tgt tma tmb tme tmg tmm tms tmt tsa tsb tse tsg tsm tss tst tta ttb tte ttg ttm tts ttt