a-be aaaa aaab aaae aaar aaba aabb aaea aage aaoe aaoo aara aare aaro abaa abab abae abag abar abax abb- abba abbb abbe abbo abbr abee aber aboa abob aboo abor abox abra abro aeer aega aer- aera aero ag-o agag agao agar agba agbo agea agee ager agga agge agob agog agoo agra agre agro aoba aora aorb arab arae arag arar arax arba arbe area aree areg areo arex arga argb arge argo aroa arob aroe aroo aror arr- arra arre arrg arro arrr axar axer axo- axoa axxo ba-x baaa baar baba babb babe babo babr baer baga bage bagg bago bar- bara barb bare barg baro barr barx bbbb bbeb bbga bbox bbrg beag bear beba bebb bebe bebo beeb beeg beer bega begg bego beo- beor bera bere berg bero berr boab boag boar boba bobb bobe bobo boea boee boeo boer boga boge bogg bogo boob booe boog boor boox bor- bora bore borg boro borr boxa brab brae brag brao brax brea breb bree breg breo brer brex broa brob broe brog broo bror brox brrr eaba eaga eage eara earb eare earo ebba ebbo ebbr eber eboe eboo ebor ebox ebro eeea eeee eega eera eerg eero egaa egae egao egar egba egbe egea egee eger eggb egge eggo ego- egor egra egre eora eore er-x erba erbb erbe ereb erer erg- erga ergg ergo erob eroe eroo erra erre erro exa- exer exge exo- exor exrx gaar gaba gabb gabe gabo gabr gaea gaer gaga gage gagg gago gara garb gare garg garo garr gbag gbbo geab gear geba gebe geer gege gegg gego geo- geog geox gera gerb gere gero gggg goar goba gobe gobo goer goga gogo goog goor gora gorb gore gorg goro gorr grab grae grbr grea greb gree greg grex grob grog groo gror grrr o-eo oaer oara oare obba obbo obea ober obex oboe obor obox obra obre obro oeax oegb oera oere ogae ogar ogb ogba ogbe ogea ogee oger ogge ogoa ogog ogra ogre ogro ooaa ooba oobe ooer oooo oora oore orab orae orao orar orba orbb orbe orbo ore- orea oreb oreg oreo orer orex orga orge orgo oro- oroe oror orra orro oxa- oxea oxer oxo- oxox oxxo raab raag raba rabb rabe rabo raeg raer raga rage ragg rago raob rara rarb rare raro raxa rbbb rbbr rea- reae reao rear reba rebb rebe rebo reeb rega rege rego regr reog rera rere rerg rero rexx rgba rgbe roab roag roar rob- roba robb robe robo roea roeg roer roga roge rogg rogo roob roog roor roox rora rore roro roxa roxo rrrr xaar xaga xago xara xare xbar xbee xbox xbra xeer xega xer- xera xero xexe xorg xoro xoxo xxxo xxxx