-er a-a a-b a-c a-t aaa aab aac aae aag aar aat aav ab- aba abb abc abe abg abr abt abv ac- aca acb acc ace acg acr act acv aea aeb aec aee aeg aer aet aev ag- aga agb agc age agg agr agt agv ar- ara arb arc are arg arr art arv at- ata atb atc ate atg atr att atv av- ava avb avc ave avg avr avt baa bab bac bae bag bar bat bav bba bbb bbc bbe bbg bbr bbt bca bcb bcc bce bcg bcr bct bcv be- bea beb bec bee beg ber bet bev bga bgb bgc bge bgg bgr bgt bgv bra brb bre brg brr brt brv bta btb btc bte btg btr btt btv bva bvb bvc bve bvg bvr bvt bvv c-- caa cab cac cae cag car cat cav cba cbb cbc cbe cbg cbr cbt cbv cca ccb ccc cce ccg ccr cct ccv ce- cea ceb cec cee ceg cer cet cev cga cgb cgc cge cgg cgr cgt cgv cra crb crc cre crg crr crt crv cta ctb ctc cte ctg ctr ctt ctv cva cvb cvc cve cvg cvr cvt cvv eaa eab eac eae eag ear eat eav eba ebb ebc ebe ebg ebr ebt ebv ec- eca ecb ecc ece ecg ecr ect ecv eea eeb eec eee eeg eer eet eev ega egb egc ege egg egr egt era erb erc ere erg err ert erv eta etb etc ete etg etr ett etv eva evb evc eve evg evr evt evv gaa gab gac gae gag gar gat gav gba gbc gbe gbg gbr gbt gbv gca gcb gcc gce gcg gcr gct ge- gea geb gec gee geg ger get gev gga ggb ggc ggg ggr ggt ggv gra grb grc gre grg grr grt grv gta gtb gtc gte gtg gtr gtt gtv gva gvb gvc gve gvg gvr gvt ra- raa rab rac rae rag rar rat rav rba rbb rbc rbe rbg rbr rbt rca rcb rcc rce rcg rcr rct rcv re- rea reb rec ree reg rer ret rev rga rgb rgc rge rgg rgr rgt rgv rra rrb rrc rrg rrr rrt rta rtb rtc rte rtg rtr rtt rtv rva rvb rvc rve rvg rvr rvt rvv taa tab tac tae tag tar tat tav tba tbb tbc tbe tbg tbr tbt tbv tca tcb tcc tce tcg tcr tct tcv te- tea teb tec tee teg ter tet tev tga tgb tgc tge tgg tgr tgt tgv tra trb trc tre trg trr trt trv tta ttb ttc tte ttg ttr ttt ttv tva tvb tvc tve tvg tvr tvt v-a v-e vaa vab vac vae vag var vat vav vba vbc vbg vbr vbv vca vcc vce vcr vct vea veb vec vee veg ver vet vga vgc vgg vgr vgt vra vrb vrc vre vrg vrr vrt vta vtb vtc vte vtg vtr vtt vtv vva vvb vvc vvg vvr vvt vvv

-vac a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aabt aaca aacb aacc aace aacr aact aacv aaea aaec aaev aage aara aarc aare aart aata aatc aatt aava abaa abab abac abae abag abar abat abb- abba abbb abbe abbr abbt abca abcb abcc abcr abct abec abee aber abet abra abrc abta abva ac-t acaa acab acac acae acag acar acat acba acca accc acce acct ace- acea acec acer acet acev acga acgr acr- acra acrc acre acrr acrv acta actc acte actg actt actv acvv aeac aecb aect aeer aega aer- aera aerc aeta aetc aetr aett aeva agac agag agar agat agav agba agca agcc agce agct agea agee ager aget agga agge agra agre agta agte agtr agva arab arac arae arag arar arat arba arbe arc- arca arce arct area arec aree areg aret arev arga argb arge arr- arra arrc arre arrg arrr arrt arta artc arte artr artv arva arve at-t ataa atab atac atae atar atat atca atcc atcr atea atec atee ater atra atrc atre atta atte attr avab avar avat avcc avce avea avec aver avra avre avva baaa baar baat baba babb babe babr bac- baca bacc bace bact baer baga bage bagg bagt bar- bara barb barc bare barg barr bart bata batc bate batt bava bave bbbb bbeb bbet bbga bbrc bbrg bcaa bcar bcat bcbc bcbg bcca bccc bcec bcer bcet bcra bctc beag bear beat beav beba bebb bebe beca beeb beeg beer beet bega begg bera berc bere berg berr bert beta betc bete bett betv bgca brab brac brae brag brat brav brca brcb brce brea breb brec bree breg brer bret brev brrr brtc btaa btcc btec btrc btrt bttb caaa caab caac caat caba cabe cabg cac- caca cacc cace cacr caec caer caga cage cagg cagr cara carb carc care carr cart cat- cata catb catc cate catt catv cava cave cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbea cbec cbee cber cbet cbga cbgb cbre cbrt cbta cbtc cbtv cbva cbvb cbve cbvg cbvr ccaa ccab ccac ccag ccar ccat ccba ccbc ccca cccb cccc cccv ccee ccga ccgc ccgt ccra ccrc ccre ccrg ccrt cctb cctc cctt cctv ceac cear ceat ceba cec- ceca cece cect ceeb ceec cege cer- cera cerc cere cert cet- ceta cete cetv ceva cgac cgcc cgcg cger crab crac crag crar crat crbc crca crcc crce crcr cre- crea creb crec cree creg cret crrt crtc crtv ctab ctae ctag ctba ctca ctec ctge ctrc ctta ctvt cvac cvar cvca cvcc cver cvet cvra cvrg cvrr cvte eaba eaca eacc eaec eaga eage eara earb eare eart eata eate eave ebac ebba ebbc ebbr ebcc eber ecaa ecac ecar ecat ecbc ecbe ecca eccb eccc ecce ecct ecra ecrc ecrr ecrv ect- ecta ectc ectv eeca eeea eeee eega eera eerc eerg eeta eetc eete eeva egaa