-er a-a a-b a-c aaa aab aac aae aao aar aau aav ab- aba abb abc abe abo abr abu abv ac- aca acb acc ace aco acr acu acv aea aeb aec aee aeo aer aeu aev aoa aob aoc aoe aoo aor aou aov ar- ara arb arc are aro arr aru arv au- aua aub auc aue auo aur auv av- ava avb avc ave avo avr avu b-u baa bab bac bae bao bar bau bav bba bbb bbc bbe bbo bbr bbu bca bcb bcc bce bco bcr bcu bcv be- bea beb bec bee beo ber beu bev boa bob boc boe boo bor bou bov bra brb bre bro brr bru brv bua bub buc bue buo bur buu bva bvb bvc bve bvo bvr bvu bvv c-- caa cab cac cae cao car cau cav cba cbb cbc cbe cbo cbr cbu cbv cca ccb ccc cce cco ccr ccu ccv ce- cea ceb cec cee ceo cer ceu cev co- coa cob coc coe coo cor cou cov cra crb crc cre cro crr cru crv cua cub cuc cue cuo cur cuu cuv cva cvb cvc cve cvo cvr cvu cvv eaa eab eac eae eao ear eau eav eba ebb ebc ebe ebo ebr ebu ebv ec- eca ecb ecc ece eco ecr ecu ecv eea eeb eec eee eeo eer eev eo- eoa eob eoc eoe eoo eor eou era erb erc ere ero err eru erv eu- eua eub euc eue eur euv eva evb evc eve evo evr evv oaa oab oac oae oao oar oau oav ob- oba obb obc obe obo obr obu obv oc- oca ocb occ oco ocr ocu ocv oea oeb oec oee oeo oer oo- ooa oob ooc ooo oor oov or- ora orb orc ore oro orr oru orv ou- oua ouc oue ouo our ov- ova ovb ovc ove ovo ovv ra- raa rab rac rae rao rar rau rav rba rbb rbc rbe rbo rbr rbu rca rcb rcc rce rco rcr rcu rcv re- rea reb rec ree reo rer reu rev roa rob roc roe roo ror rou rov rra rrb rrc rrr rru rua rub ruc rue ruo rur ruu ruv rva rvb rvc rve rvo rvr rvu rvv ua- uaa uab uac uae uao uar uau uav uba ubb ubc ube ubo ubr ubu ubv uca ucb ucc uce uco ucr ucu ucv uea ueb uec uee uer uoa uob uoc uoe uoo uor ur- ura urb urc ure uro urr uru uua uuc uue uur uuu uva uvb uvc uve uvo uvu uvv v-a v-e vaa vab vac vae vao var vau vav vba vbc vbo vbr vbv vca vcc vce vco vcr vcu vea veb vec vee veo ver veu voa vob voc voe voo vor vou vov vra vrb vrc vre vrr vru vue vur vuv vva vvb vvc vvo vvr vvv

-vac a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aaca aacb aacc aace aaco aacr aacu aacv aaea aaec aaev aaoe aaoo aara aarc aare aaro aaru aava abaa abab abac abae abar abau abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber aboa abob aboo abor abou abov abra abrc abro abua abue abva acaa acab acac acae acar acba acca accc acce acco accu ace- acea acec acer acev acoa acoe acor acou acr- acra acrc acre acro acrr acrv acu- acue acuo acur acvv aeac aecb aeer aer- aera aerc aero aeva aoba aoca aoce aoeu aora aorb arab arac arae arar arau arba arbe arc- arca arce arco area arec aree areo areu arev aroa arob aroe aroo aror arr- arra arrc arre arro arrr arru arua arub arue arva arve arvo auaa aube auca auce auer aur- aura aure auro auve avab avao avar avcc avce avco avea avec aveo aver aveu avor avou avra avre avro avur avva avvo baaa baar baba babb babe babo babr babu bac- baca bacc bace baco baer bar- bara barb barc bare baro barr baru bau- baur bava bave bavu bbau bbbb bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bcor bcra bcru bcuc bcvo bear beau beav beba bebb bebe bebo beca becu beeb beer beo- beor bera berc bere bero berr beru beur bevo boab boac boar boba bobb bobe bobo bobu boca boce boco bocu boea boec boee boeo boer boob booc booe boor bor- bora bore boro borr boru boua boue bour bova bove bovo brab brac brae brao brau brav brca brcb brce brea breb brec bree breo brer brev broa brob broc broe broo bror brou brrr bruc brue bruv buar buba bubb bube bubo bubu buca bucc buce buco bucu buea buer bueu bur- bura burb bure buro burr buru buve c-bo caaa caab caac caba cabe cabo cabu cac- caca cacc cace caco cacr caec caer caeu caor cara carb carc care caro carr cauc cauo cava cave cavo cavu cbac cbar cbbc cbca cbcc cbce cbcr cbcu cbea cbec cbee cber cbre cbva cbvb cbve cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccu cccv ccee ccob ccoc ccra ccrc ccre ccuc ccvo ceac cear ceba cebu cec- ceca cece ceco ceeb ceec ceor ceou cer- cera cerc cere cero ceva cevo coba cobb cobe cobo cobu coca coce coco cocu coob cor- cora corb corc core coro corr coua coub coue cour cova cove covo crab crac crar crau crbc crbu crca crcc crce crcr cre- crea creb crec cree creo creu crob croc croe croo cror crub crue cuau cub- cuba cubb cube cuca cucc cuce cuer cura curb cure curo curr cuve cvac cvar cvca cvcc cver cvra cvrr eaba eaca eacc eaec eara earb eare earo eave ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebro ebru ebur ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco eco- ecou ecra