-er a-a a-b a-c aaa aab aac aae aak aar aau aav ab- aba abb abc abe abk abr abu abv ac- aca acb acc ace ack acr acu acv aea aeb aec aee aek aer aeu aev aka akb akc ake akk akr aku akv ar- ara arb arc are ark arr aru arv au- aua aub auc aue auk aur auv av- ava avb avc ave avk avr avu b-u baa bab bac bae bak bar bau bav bba bbb bbc bbe bbk bbr bbu bca bcb bcc bce bck bcr bcu bcv be- bea beb bec bee bek ber beu bev bka bkb bkc bke bkk bkr bkv bra brb bre brk brr bru brv bua bub buc bue buk bur buu bva bvb bvc bve bvk bvr bvu bvv c-- caa cab cac cae cak car cau cav cba cbb cbc cbe cbk cbr cbu cbv cca ccb ccc cce cck ccr ccu ccv ce- cea ceb cec cee cek cer ceu cev cka ckb ckc cra crb crc cre crk crr cru crv cua cub cuc cue cuk cur cuu cuv cva cvb cvc cve cvk cvr cvu cvv eaa eab eac eae eak ear eau eav eba ebb ebc ebe ebk ebr ebu ebv ec- eca ecb ecc ece eck ecr ecu ecv eea eeb eec eee eek eer eev eka ekb ekc eke ekr eku ekv era erb erc ere erk err eru erv eu- eua eub euc eue eur euv eva evb evc eve evr evv ka- kaa kab kac kae kak kar kau kav kba kbb kbc kbe kbk kbr kbu kca kcb kcc kce kck kcr kcu ke- kea keb kec kee kek ker kev kkb kkc kke kkk kkr kku kkv kra krc krk krr kru krv kub kuc kue kuk kur kuu kva kvb kvk kvr kvv ra- raa rab rac rae rak rar rau rav rba rbb rbc rbe rbk rbr rbu rca rcb rcc rce rcr rcu rcv re- rea reb rec ree rek rer reu rev rkb rkc rke rkk rku rkv rra rrb rrc rrk rrr rru rua rub ruc rue ruk rur ruu ruv rva rvb rvc rve rvr rvu rvv ua- uaa uab uac uae uak uar uau uav uba ubb ubc ube ubk ubr ubu ubv uca ucb ucc uce uck ucr ucu ucv uea ueb uec uee uer uka ukb ukc uke ukk ukr uku ur- ura urb urc ure urk urr uru uua uuc uue uur uuu uva uvb uvc uve uvu uvv v-a v-e vaa vab vac vae vak var vau vav vba vbc vbk vbr vbv vca vcc vce vcr vcu vea veb vec vee vek ver veu vka vkb vra vrb vrc vre vrk vrr vru vue vuk vur vuv vva vvb vvc vvr vvv

-vac a-ak a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aaca aacb aacc aace aack aacr aacu aacv aaea aaec aaev aaka aake aaku aara aarc aare aaru aava abaa abab abac abae abak abar abau abb- abba abbb abbe abbr abca abcb abcc abcr abec abee aber abra abrc abua abue abuk abva acaa acab acac acae acar acba acca accc acce accu ace- acea acec acek acer acev acke acr- acra acrc acre acrr acrv acu- acue acur acvv aeac aecb aeer aeka aer- aera aerc aeva akaa akae akar akca akee aker akeu akka akku akr- akra akre akua arab arac arae arak arar arau arba arbe arc- arca arce area arec aree arek areu arev arka arke arr- arra arrc arre arrk arrr arru arua arub arue arva arve auaa aube auca auce auer auke aur- aura aure auve avab avar avcc avce avea avec aver aveu avra avre avur avva baaa baak baar baba babb babe babr babu bac- baca bacc bace back baek baer bak- baka bake bakr baku bar- bara barb barc bare bark barr baru bau- bauk baur bava bave bavu bbau bbbb bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bcra bcru bcuc beak bear beau beav beba bebb bebe beca beck becu beeb beek beer beka beke bera berc bere berk berr beru beuk beur brab brac brae brak brau brav brca brcb brce brea breb brec bree brek brer brev brka brkb brrr bruc brue bruv buar buba bubb bube bubu buca bucc buce buck bucu buea buer bueu buka buke bukk buku bur- bura burb bure burk burr buru buve caaa caab caac caba cabe cabu cac- caca cacc cace cack cacr caec caer caeu caka cake cara carb carc care cark carr cauc cauk cava cave cavu cbac cbar cbbc cbca cbcc cbce cbcr cbcu cbea cbec cbee cber cbka cbkr cbre cbva cbvb cbve cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccu cccv ccee ccra ccrc ccre ccuc ceac cear ceba cebu cec- ceca cece ceeb ceec ceke cer- cera cerc cere ceva ckac ckbc ckbe ckck ckcv cker ckrc crab crac crar crau crbc crbu crca crcc crce crcr cre- crea creb crec cree creu crkc crub crue cruk cuau cub- cuba cubb cube cuca cucc cuce cuck cuek cuer cuk- cuka cuke cura curb cure curr cuve cvac cvar cvca cvcc cver cvra cvrr eaba eaca eacc eaec eara earb eare eave ebac ebba ebbc ebbr ebcc eber ebru ebur ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecka ecra ecrc ecrr ecru ecrv ecua eeca eeea eeee eeka eeke eera eerc eeva eka- ekab ekeb ekek eker ekka ekur erau erba erbb erbe erca ercc erce ereb erec erer erev erke erra errc erre erua erub eruc erur eruv erve euba eubc euer eur- eura eurc eure evac evae evar evea ever evra evre evvk kaaa kaab kaak kaar kaba kabb kabc kabe kabr kabu kacb kacc kace kacu kacv kaer kaka kakc kake kakk kaku kara karb kare kark karr karu karv kau- kaub kauc kaue kauk kaur kava kavb kave kavu kavv kbaa kbab kbac