-er a-a a-b a-c aaa aab aac aae aag aar aau aav ab- aba abb abc abe abg abr abu abv ac- aca acb acc ace acg acr acu acv aea aeb aec aee aeg aer aeu aev ag- aga agb agc age agg agr agu agv ar- ara arb arc are arg arr aru arv au- aua aub auc aue aug aur auv av- ava avb avc ave avg avr avu b-u baa bab bac bae bag bar bau bav bba bbb bbc bbe bbg bbr bbu bca bcb bcc bce bcg bcr bcu bcv be- bea beb bec bee beg ber beu bev bga bgb bgc bge bgg bgr bgu bgv bra brb bre brg brr bru brv bua bub buc bue bug bur buu bva bvb bvc bve bvg bvr bvu bvv c-- caa cab cac cae cag car cau cav cba cbb cbc cbe cbg cbr cbu cbv cca ccb ccc cce ccg ccr ccu ccv ce- cea ceb cec cee ceg cer ceu cev cga cgb cgc cge cgg cgr cgu cgv cra crb crc cre crg crr cru crv cua cub cuc cue cug cur cuu cuv cva cvb cvc cve cvg cvr cvu cvv eaa eab eac eae eag ear eau eav eba ebb ebc ebe ebg ebr ebu ebv ec- eca ecb ecc ece ecg ecr ecu ecv eea eeb eec eee eeg eer eev ega egb egc ege egg egr egu era erb erc ere erg err eru erv eu- eua eub euc eue eug eur euv eva evb evc eve evg evr evv gaa gab gac gae gag gar gau gav gba gbc gbe gbg gbr gbu gbv gca gcb gcc gce gcg gcr gcu ge- gea geb gec gee geg ger geu gev gga ggb ggc ggg ggr ggu ggv gra grb grc gre grg grr gru grv gu- gua gub guc gue gug gur guu guv gva gvb gvc gve gvg gvr gvu ra- raa rab rac rae rag rar rau rav rba rbb rbc rbe rbg rbr rbu rca rcb rcc rce rcg rcr rcu rcv re- rea reb rec ree reg rer reu rev rga rgb rgc rge rgg rgr rgv rra rrb rrc rrg rrr rru rua rub ruc rue rug rur ruu ruv rva rvb rvc rve rvg rvr rvu rvv ua- uaa uab uac uae uag uar uau uav uba ubb ubc ube ubg ubr ubu ubv uca ucb ucc uce ucg ucr ucu ucv uea ueb uec uee ueg uer uga ugb ugc uge ugg ugr ugu ur- ura urb urc ure urg urr uru uua uuc uue uug uur uuu uva uvb uvc uve uvu uvv v-a v-e vaa vab vac vae vag var vau vav vba vbc vbg vbr vbv vca vcc vce vcr vcu vea veb vec vee veg ver veu vga vgc vgg vgr vgu vra vrb vrc vre vrg vrr vru vue vug vur vuv vva vvb vvc vvg vvr vvv

-vac a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aaca aacb aacc aace aacr aacu aacv aaea aaec aaev aage aara aarc aare aaru aava abaa abab abac abae abag abar abau abb- abba abbb abbe abbr abca abcb abcc abcr abec abee aber abra abrc abua abue abug abva acaa acab acac acae acag acar acba acca accc acce accu ace- acea acec acer acev acga acgr acr- acra acrc acre acrr acrv acu- acue acur acvv aeac aecb aeer aega aer- aera aerc aeva agac agag agar agau agav agba agca agcc agce agea agee ager agga agge aggu agra agre agua ague agur agva arab arac arae arag arar arau arba arbe arc- arca arce area arec aree areg areu arev arga argb arge arr- arra arrc arre arrg arrr arru arua arub arue arug arva arve auaa aube auca auce auer auga auge aur- aura aure auug auve avab avar avcc avce avea avec aver aveu avra avre avur avva baaa baar baba babb babe babr babu bac- baca bacc bace baer baga bage bagg bar- bara barb barc bare barg barr baru bau- baug baur bava bave bavu bbau bbbb bbeb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcec bcer bcra bcru bcuc beag bear beau beav beba bebb bebe beca becu beeb beeg beer bega begg begu bera berc bere berg berr beru beur bgca brab brac brae brag brau brav brca brcb brce brea breb brec bree breg brer brev brrr bruc brue brug bruv buar buba bubb bube bubu buca bucc buce bucu buea buer bueu buga buge bugg bur- bura burb bure burg burr buru buve caaa caab caac caba cabe cabg cabu cac- caca cacc cace cacr caec caer caeu caga cage cagg cagr cara carb carc care carr cauc cava cave cavu cbac cbar cbbc cbca cbcc cbce cbcr cbcu cbea cbec cbee cber cbga cbgb cbre cbva cbvb cbve cbvg cbvr ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc cccu cccv ccee ccga ccgc ccra ccrc ccre ccrg ccuc ceac cear ceba cebu cec- ceca cece ceeb ceec cege cer- cera cerc cere ceva cgac cgcc cgcg cger crab crac crag crar crau crbc crbu crca crcc crce crcr cre- crea creb crec cree creg creu crub crue crug cuau cub- cuba cubb cube cuca cucc cuce cuer cuga cura curb cure curr cuve cvac cvar cvca cvcc cver cvra cvrg cvrr eaba eaca eacc eaec eaga eage eara earb eare eave ebac ebba ebbc ebbr ebcc eber ebru ebur ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecra ecrc ecrr ecru ecrv ecua eeca eeea eeee eega eera eerc eerg eeva egaa egae egar egba egbe egbu egcc egcg egcr egea egec egee eger eggb egge egra egre erau erba erbb erbe erca ercc erce ereb erec erer erev erg- erga ergg erra errc erre erua erub eruc erur eruv erve euba eubc euer euge eur- eura eurc eure evac evae evar evea ever evga evra