-vac a-be aaaa aaab aaac aaae aaap aaar aaav aaba aabb aabc aabp aaca aacb aacc aace aaco aacp aacr aacv aaea aaec aaep aaev aaoe aaoo aapa aapc aapo aara aarc aare aaro aarp aava abaa abab abac abae abap abar abb- abba abbb abbe abbo abbr abca abcb abcc abcp abcr abec abee aber aboa abob aboo abor abov abpa abpc abpp abpr abra abrc abro abva abvp acaa acab acac acae acap acar acba acca accc acce acco accp ace- acea acec acer acev acoa acoe acop acor acpa acpe acpr acr- acra acrc acre acro acrr acrv acvv aeac aeap aecb aeer aer- aera aerc aero aeva aoba aoca aoce aopo aora aorb apac apao apap apar apba apbr apca apcb apcc apco apcr apea apec apep aper apev apo- apoc apoe apoo apop apor appa appc appr apra aprc apre apro arab arac arae arap arar arba arbe arc- arca arce arco area arec aree areo arep arev aroa arob aroe aroo aror arpa arpe 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 bapa bapc bape bapp bar- bara barb barc bare baro barr bava bave bbbb bbeb bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcec bcer bcor bcpp bcra bcvo beap bear beav beba bebb bebe bebo beca beeb beep beer beo- beor bepo bera berc bere bero berr bevo boab boac boar boba bobb bobe bobo boca boce boco boea boec boee boeo boep boer boob booc booe boop boor bopa bope bopp bor- bora bore boro borr bova bove bovo bpcp bpea bpoe bprc brab brac brae brao brav brca brcb brce brea breb brec bree breo brep brer brev broa brob broc broe broo bror brrr c-bo caaa caab caac caap caba cabe cabo cac- caca cacc cace caco cacr caec caer caor capa capb capc cape capo capp cara carb carc care caro carp carr cava cave cavo cbac cbar cbbc cbca cbcc cbce cbcp cbcr cbea cbec cbee cber cbpc cbpp cbre cbva cbvb cbve cbvp cbvr ccaa ccab ccac ccap ccar ccba ccbc ccca cccb cccc cccp cccv ccee ccob ccoc ccpa ccpe ccpp ccpr ccra ccrc ccre ccrp ccvo ceac cear ceba cebp cec- ceca cece ceco cecp ceeb ceec ceop ceor cepa cepc cepe cepo cepp cepr cer- cera cerc cere cero cerp ceva cevo coba cobb cobe cobo coca coce coco cocp coep coob coop copa cope copo copp copr cor- cora corb corc core coro corp corr cova cove covo cpaa cpac cpap cpbc cpca cpce cpea cpeb cpep cper cppa cpre cpvc crab crac crap crar crbc crca crcc crce crcr cre- crea creb crec cree creo crep crob croc croe croo crop cror crpc cvac cvar cvca cvcc cver cvra cvrr eaba eaca eacc eaec eaop eapc eapp eara earb eare earo earp eave eavp ebac ebba ebbc ebbo ebbr ebcc eber eboe eboo ebor ebpo ebro ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco eco- ecop ecpa ecpp ecra ecrc ecrr ecrv eeca eeea eeee eeoc eera eerc eero eeva eora eore epaa epac epcc epec epee eper epoc epor eppa eppc eppo eppp epra eprb epro eprp erap erba erbb erbe erca ercc erce ercp ereb erec erer erev erob eroc eroe eroo erpa erpe erra errc erre erro erve evac evae evap evar evea ever evoe evoo evop evra evre o-eo oaer oara oare obba obbo obea obec ober oboe obor obra obre obro ocab ocac ocap ocbc occa occc oce ocee ocpa ocpp ocra ocre ocro ocrr oec- oeca oecc oeec oepa oera oere oevp ooaa ooba oobe oocr ooer oooo oora oore opap opar opca opec opep oper opo- opor oppa oppo opra orab orac orae orao orar orav orba orbb orbe orbo orca orce orco ore- orea oreb orec oreo orer oro- oroe oror orpc orpe orra orro orve orvr ovar ovee over ovo- ovoo ovpp ovra ovre paap paar paba paca pace paco paea paec paep paer paoc papa papb pape papp papr par- para parc pare paro parp parr parv pava pave pavo pbac pbar pbcc pboc pbpa pcaa pcae pcap pcba pcbc pcca pccc pcce pcea pcep pcer pcoa pcoe pcpb pcpp pcra pcrc pcre peab peac peap pear peba peca pece peco pecr peec peep peer peev peor pepa pepe pepo per- pera perc pere pero perp perr perv poar poba pobo poca poce poco poea poer poop poor pop- popa popc pope popo popp pora porb porc pore poro porr povo ppac ppap ppar ppbv ppcc pper ppoa pppa pppo pppp pprc prae prao prar prbc prca prcc prcp pre- preb prec pree prep prev pro- proa prob proc proe proo prop prov pvco pvpa raab raba rabb rabe rabo rac- raca racc race raco racv raec raep raer raob raoc raop rapa rapc rape rapp rara rarb rare raro rava rave rbbb rbbr rcac rcbc rcbo rccb rccc rcep rcpo rcvr rea- reac reae reao reap rear reba rebb rebe rebo reca recc rece recp recr reeb reep reev reop repe repo repp repr rera rere rero reva reve revo revp roab roap roar rob- roba robb robe robo roca rocc roce roco roea roer roev roob roop roor ropa rope ropo rora rorc rore roro rova rove rovo rpca rpob rpoe rrrr rv-c rvca rver vaar vaca vace vaco vapa vapb vape vara vare varp varr vava vbcc vear veba vecc veep veer veor vepe vepr ver- vera verb vere vero veve vevo voar voca voce voer vooc voor vor- vora vore voro vpro vrac vrap vrav vrba vreo vroc vver vvob vvpb vvvv