-er a-a a-b a-c a-t aaa aab aac aae aar aat aau aav ab- aba abb abc abe abr abt abu abv ac- aca acb acc ace acr act acu acv aea aeb aec aee aer aet aeu aev ar- ara arb arc are arr art aru arv at- ata atb atc ate atr att atu atv au- aua aub auc aue aur aut auv av- ava avb avc ave avr avt avu b-u baa bab bac bae bar bat bau bav bba bbb bbc bbe bbr bbt bbu bca bcb bcc bce bcr bct bcu bcv be- bea beb bec bee ber bet beu bev bra brb bre brr brt bru brv bta btb btc bte btr btt btu btv bua bub buc bue bur but buu bva bvb bvc bve bvr bvt bvu bvv c-- caa cab cac cae car cat cau cav cba cbb cbc cbe cbr cbt cbu cbv cca ccb ccc cce ccr cct ccu ccv ce- cea ceb cec cee cer cet ceu cev cra crb crc cre crr crt cru crv cta ctb ctc cte ctr ctt ctu ctv cua cub cuc cue cur cut cuu cuv cva cvb cvc cve cvr cvt cvu cvv eaa eab eac eae ear eat eau eav eba ebb ebc ebe ebr ebt ebu ebv ec- eca ecb ecc ece ecr ect ecu ecv eea eeb eec eee eer eet eev era erb erc ere err ert eru erv eta etb etc ete etr ett etu etv eu- eua eub euc eue eur eut euv eva evb evc eve evr evt evv ra- raa rab rac rae rar rat rau rav rba rbb rbc rbe rbr rbt rbu rca rcb rcc rce rcr rct rcu rcv re- rea reb rec ree rer ret reu rev rra rrb rrc rrr rrt rru rta rtb rtc rte rtr rtt rtu rtv rua rub ruc rue rur rut ruu ruv rva rvb rvc rve rvr rvt rvu rvv taa tab tac tae tar tat tau tav tba tbb tbc tbe tbr tbt tbu tbv tca tcb tcc tce tcr tct tcu tcv te- tea teb tec tee ter tet teu tev tra trb trc tre trr trt tru trv tta ttb ttc tte ttr ttt ttu ttv tua tub tuc tue tur tut tuu tuv tva tvb tvc tve tvr tvt tvu ua- uaa uab uac uae uar uat uau uav uba ubb ubc ube ubr ubt ubu ubv uca ucb ucc uce ucr uct ucu ucv uea ueb uec uee uer uet ur- ura urb urc ure urr urt uru uta utb utc ute utr utt utu utv uua uuc uue uur uut uuu uva uvb uvc uve uvu uvv v-a v-e vaa vab vac vae var vat vau vav vba vbc vbr vbv vca vcc vce vcr vct vcu vea veb vec vee ver vet veu vra vrb vrc vre vrr vrt vru vta vtb vtc vte vtr vtt vtu vtv vue vur vut vuv vva vvb vvc vvr vvt vvv

-vac a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aabt aaca aacb aacc aace aacr aact aacu aacv aaea aaec aaev aara aarc aare aart aaru aata aatc aatt aava abaa abab abac abae abar abat abau abb- abba abbb abbe abbr abbt abca abcb abcc abcr abct abec abee aber abet abra abrc abta abtu abua abue abut abva ac-t acaa acab acac acae acar acat acba acca accc acce acct accu ace- acea acec acer acet acev acr- acra acrc acre acrr acrv acta actc acte actt actu actv acu- acue acur acut acvv aeac aecb aect aeer aer- aera aerc aeta aetc aetr aett aeva arab arac arae arar arat arau arba arbe arc- arca arce arct area arec aree aret areu arev arr- arra arrc arre arrr arrt arru arta artc arte artr artv arua arub arue arut arva arve at-t ataa atab atac atae atar atat atca atcc atcr atea atec atee ater atra atrc atre atru atta atte attr attu atua atub atuc atur auaa aube auca auce auct auer aur- aura aure aut- aute auve avab avar avat avcc avce avea avec aver aveu avra avre avur avva baaa baar baat baba babb babe babr babu bac- baca bacc bace bact baer bar- bara barb barc bare barr bart baru bata batc bate batt batu bau- baur bava bave bavu bbau bbbb bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcec bcer bcet bcra bcru bctc bcuc bear beat beau beav beba bebb bebe beca becu beeb beer beet bera berc bere berr bert beru beta betc bete bett betu betv beur brab brac brae brat brau brav brca brcb brce brea breb brec bree brer bret brev brrr brtc bruc brue brut bruv btaa btcc btec btrc btrt bttb buar buat buba bubb bube bubu buca bucc buce bucu buea buer bueu bur- bura burb bure burr burt buru but- buta bute butt buve caaa caab caac caat caba cabe cabu cac- caca cacc cace cacr caec caer caeu cara carb carc care carr cart cat- cata catb catc cate catt catu catv cauc caut cava cave cavu cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbcu cbea cbec cbee cber cbet cbre cbrt cbta cbtc cbtv cbva cbvb cbve cbvr ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc cccu cccv ccee ccra ccrc ccre ccrt cctb cctc cctt cctv ccuc ccut ceac cear ceat ceba cebu cec- ceca cece cect ceeb ceec cer- cera cerc cere cert cet- ceta cete cetv ceva crab crac crar crat crau crbc crbu crca crcc crce crcr cre- crea creb crec cree cret creu crrt crtc crtv crub crue crut ctab ctae ctba ctca ctec ctrc ctta ctvt cuau cub- cuba cubb cube cuca cucc cuce cuer cura curb cure curr curt cut- cuta cutc cute cutt cutv cuve cvac cvar cvca cvcc cver cvet cvra cvrr cvte eaba eaca eacc eaec eara earb eare eart