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a-be a-wa aaaa aaab aaac aaae aaar aaba aabb aabc aabw aaca aacb aacc aace aaco aacr aaea aaec aaoe aaoo aaow aara aarc aare aaro aaww abaa abab abac abae abar abaw abb- abba abbb abbe abbo abbr abca abcb abcc abcr abcw abec abee aber aboa abob aboo abor abow abra abrc abro abwa abwe abwr acaa acab acac acae acar acba acca accc acce acco ace- acea acec acer acoa acoe acor acow acr- acra acrc acre acro acrr acwa acww aeac aecb aeer aer- aera aerc aero aoba aoca aoce aora aorb arab arac arae arar araw arba arbe arc- arca arce arco area arec aree areo arew aroa arob aroe aroo aror arow arr- arra arrc arre arro arrr arwa arwe awac awae awar awbe awe- aweb awee awer awoo awow awre awro awwa baaa baar baba babb babe babo babr bac- baca bacc bace baco baer bar- bara barb barc bare baro barr baw- bawe bbbb bbeb bbrc bbwc bbwr bcaa bcar bcbc bcca bccc bcec bcer bcor bcra bear beaw beba bebb bebe bebo beca beeb beer beo- beor bera berc bere bero berr bewa bewe boab boac boar boba bobb bobe bobo bobw boca boce boco boea boec boee boeo boer boob booc booe boor boow bor- bora bore boro borr borw bowa bowe bowr brab brac brae brao braw brca brcb brce brcw brea breb brec bree breo brer brew broa brob broc broe broo bror brow brrr brwe bwaa bwoc c-bo caaa caab caac caba cabe cabo cac- caca cacc cace caco cacr cacw caec caer caor cara carb carc care caro carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbre cbwa ccaa ccab ccac ccar ccba ccbc ccca cccb cccc ccee ccob ccoc ccow ccra ccrc ccre ceac cear ceba cec- ceca cece ceco ceeb ceec ceor cer- cera cerc cere cero cewa cewe coba cobb cobe cobo coca coce coco coob cor- cora corb corc core coro corr cowe crab crac crar craw crbc crca crcc crce crcr cre- crea creb crec cree creo crew crob croc croe croo cror crow cwac cweb cwer cwrw eaba eaca eacc eaec eara earb eare earo earw ebac ebba ebbc ebbo ebbr ebbw ebcc eber eboe eboo ebor ebow ebro ecaa ecac ecao ecar ecbc ecbe ecca eccb eccc ecce ecco eco- ecra ecrc ecrr ecwa eeca eeea eeee eeoc eera eerc eero eora eore erba erbb erbe erca ercc erce ereb erec erer erew erob eroc eroe eroo erra errc erre erro ewer ewew ewre 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 orba orbb orbe orbo orca orce orco ore- orea oreb orec oreo orer oro- oroe oror orra orro orwa orwe orwo owar owea ower owoe owow owre owwa raab raba rabb rabe rabo rac- raca racc race raco raec raer raob raoc rara rarb rare raro rawa rawe rawr raww rbbb rbbr rcac rcbc rcbo rccb rccc rea- reac reae reao rear reba rebb rebe rebo reca recc rece recr reeb rera rere rero rewa rewe roab roar rob- roba robb robe robo roca rocc roce roco roea roer roob roor rora rorc rore roro rowa rowb rowe rowr roww rrrr waaa waac waao waar waaw waba wabb wabc wabe wabo wabr wabw waca wacb wacc wace waco waeb waec waee waer waew waob waoc waoe waoo waor waow war- wara warb warc ware waro warr warw wawa wawb wawc wawe wawo wbaa wbab wbac wbae wbar wbbb wbbe wbbo wbbr wbbw wbca wbcb wbce wbco wbcr wbcw wbea wbeb wbec wber wbew wbob wboc wbor wbow wbrb wbrc wbrr wbrw wbwb wbwc wbwo wcab wcae wcao wcar wcba wcbc