-er a-a a-b a-c aaa aab aac aae aao aar aav ab- aba abb abc abe abo abr abv ac- aca acb acc ace aco acr acv aea aeb aec aee aeo aer aev aoa aob aoc aoe aoo aor aov ar- ara arb arc are aro arr arv av- ava avb avc ave avo avr baa bab bac bae bao bar bav bba bbb bbc bbe bbo bbr bca bcb bcc bce bco bcr bcv be- bea beb bec bee beo ber bev boa bob boc boe boo bor bov bra brb bre bro brr brv bva bvb bvc bve bvo bvr bvv c-- caa cab cac cae cao car cav cba cbb cbc cbe cbo cbr cbv cca ccb ccc cce cco ccr ccv ce- cea ceb cec cee ceo cer cev co- coa cob coc coe coo cor cov cra crb crc cre cro crr crv cva cvb cvc cve cvo cvr cvv eaa eab eac eae eao ear eav eba ebb ebc ebe ebo ebr ebv ec- eca ecb ecc ece eco ecr ecv eea eeb eec eee eeo eer eev eo- eoa eob eoc eoe eoo eor era erb erc ere ero err erv eva evb evc eve evo evr evv oaa oab oac oae oao oar oav ob- oba obb obc obe obo obr obv oc- oca ocb occ oco ocr ocv oea oeb oec oee oeo oer oo- ooa oob ooc ooo oor oov or- ora orb orc ore oro orr orv ov- ova ovb ovc ove ovo ovv ra- raa rab rac rae rao rar rav rba rbb rbc rbe rbo rbr rca rcb rcc rce rco rcr rcv re- rea reb rec ree reo rer rev roa rob roc roe roo ror rov rra rrb rrc rrr rva rvb rvc rve rvo rvr rvv v-a v-e vaa vab vac vae vao var vav vba vbc vbo vbr vbv vca vcc vce vco vcr vea veb vec vee veo ver voa vob voc voe voo vor vov vra vrb vrc vre vrr vva vvb vvc vvo vvr vvv

-vac a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aaca aacb aacc aace aaco aacr aacv aaea aaec aaev aaoe aaoo aara aarc aare aaro aava abaa abab abac abae abar abb- abba abbb abbe abbo abbr abca abcb abcc abcr abec abee aber aboa abob aboo abor abov abra abrc abro abva acaa acab acac acae acar acba acca accc acce acco ace- acea acec acer acev acoa acoe acor acr- acra acrc acre acro acrr acrv acvv aeac aecb aeer aer- aera aerc aero aeva aoba aoca aoce aora aorb arab arac arae arar arba arbe arc- arca arce arco area arec aree areo arev aroa arob aroe aroo aror arr- arra arrc arre arro arrr arva arve arvo avab avao avar avcc avce avco avea avec aveo aver avor avra avre avro avva avvo baaa baar baba babb babe babo babr bac- baca bacc bace baco baer bar- bara barb barc bare baro barr bava bave bbbb bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bcor bcra bcvo bear beav beba bebb bebe bebo beca beeb beer beo- beor bera berc bere bero berr bevo boab boac boar boba bobb bobe bobo boca boce boco boea boec boee boeo boer boob booc booe boor bor- bora bore boro borr bova bove bovo brab brac brae brao brav brca brcb brce brea breb brec bree breo brer brev broa brob broc broe broo bror brrr c-bo caaa caab caac caba cabe cabo cac- caca cacc cace caco cacr caec caer caor cara carb carc care caro carr cava cave cavo cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbre cbva cbvb cbve cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccv ccee ccob ccoc ccra ccrc ccre ccvo ceac cear ceba cec- ceca cece ceco ceeb ceec ceor cer- cera cerc cere cero ceva cevo coba cobb cobe cobo coca coce coco coob cor- cora corb corc core coro corr cova cove covo crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree creo crob croc croe croo cror 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 ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco eco- ecra ecrc ecrr ecrv eeca eeea eeee eeoc eera eerc eero eeva eora eore erba erbb erbe erca ercc erce ereb erec erer erev erob eroc eroe eroo erra errc erre erro erve evac evae evar evea ever evoe evoo evra evre o-eo oaer oara oare obba obbo obea obec ober oboe obor obra obre obro ocab ocac ocbc occa occc oce ocee ocra ocre ocro ocrr oec- oeca oecc oeec oera oere ooaa ooba oobe oocr ooer oooo oora oore orab orac orae orao orar orav orba orbb orbe orbo orca orce orco ore- orea oreb orec oreo orer oro- oroe oror orra orro orve orvr ovar ovee over ovo- ovoo ovra ovre raab raba rabb rabe rabo rac- raca racc race raco racv raec raer raob raoc rara rarb rare raro rava rave rbbb rbbr rcac rcbc rcbo rccb rccc rcvr rea- reac reae reao rear reba rebb rebe rebo reca recc rece recr reeb reev rera rere rero reva reve revo roab roar rob- roba robb robe robo roca rocc roce roco roea roer roev roob roor rora rorc rore roro rova rove rovo rrrr rv-c rvca rver vaar vaca vace vaco vara vare varr vava vbcc vear veba vecc veer veor ver- vera verb vere vero veve vevo voar voca voce voer vooc voor vor- vora vore voro vrac vrav vrba vreo vroc vver vvob vvvv

-aaa- aaace aaaee aaaoc aaarc aabaa aabba aabra aacbc abaab ababa ababe abaca abaco abaer abara abare abava abave abbac abbar abccc abear abeba abebe abece abeer abera abere aberr aboab abobo abora