a-be a-do aaaa aaab aaad aaae aaar aaba aabb aabd aada aade aaea aaoe aaoo aara aard aare aaro abaa abab abad abae abar abax abb- abba abbb abbe abbo abbr abda abdo abed abee aber aboa abob abod aboo abor abox abra abro adaa adab adad adae adao adar adba adda addd adde addo addr adea adeb adee adeo ader adob adod adoe adoo ador adox adra adre adro aede aeer aer- aera aerd aero aoba aora aorb arab arad arae arar arax arba arbe arda arde ardo area ared aree areo arex aroa arob arod aroe aroo aror arr- arra arre arro arrr axar axed axer axo- axoa axxo ba-x baaa baad baar baba babb babe babo babr bada badb badd bade bado badr baed baer bar- bara barb bard bare baro barr barx bbad bbbb bbdd bbdo bbeb bbox bd-r bead bear beba bebb bebe bebo beda bede bedo beeb beed beer beo- beod beor bera berd bere bero berr boab boad boar boba bobb bobe bobo boda bodb bode bodo boea boee boeo boer boob bood booe boor boox bor- bora bord bore boro borr boxa brab brad brae brao brax brda brdo brea breb bred bree breo brer brex broa brob brod broe broo bror brox brrr d-bo daab daad daae daar daba dabb dabo dada dade dado daeb daer dara darb dard dare daro darr dbar dddd ddre dead deae dear deba debe deda dedd dede dedo deeb deed deer deor der- dera derb dere dero derr dex- dexa dexe do-x doab doae doar doba dobb dobe dod- doda dodd dode dodo doea doer doob dood door dora dord dore doro dorr doxa draa drab drad drar drax drba drda drea dred dree drob drod drra dxab dxbe dxbr dxdr dxed dxra dxrd dxre dxrr dxrx dxxr dxxx eaba eada eadb eadd eara earb eard eare earo ebba ebbo ebbr ebed eber eboe eboo ebor ebox ebro edad edar edax edda edde eddo ede- edea eder edex edod edra eede eeea eeee eera eero eode eora eore er-x erad erba erbb erbe erda erde ereb ered erer erob erod eroe eroo erra erre erro exa- exda exed exer exo- exod exor exrx o-eo oade oaer oara oare obad obba obbo obea obed ober obex oboe obor obox obra obre obro odax odbo odda oddd odea oded odeo oder odex odoo odor odra oeax oedo oera oere ooaa ooba oobe ooda ooer oooo oora oord oore orab orad orae orao orar orba orbb orbe orbo orda orde ordo ore- orea oreb ored oreo orer orex oro- oroe oror orra orro oxa- oxea oxer oxo- oxox oxxo raab raad raba rabb rabe rabo rada radd rade rado radr radx raed raer raob rara rarb rare raro raxa rbbb rbbr rder rea- read reae reao rear reba rebb rebe rebo reda redd rede redo redr redx reeb reed reod rera rerd rere rero rexx roab road roar rob- roba robb robe robo roda rodd rode rodo roea roed roer roob rood roor roox rora rore roro roxa roxo rrad rred rrrr x-ed xaar xado xara xare xbar xbee xbox xbra xeer xer- xera xero xexe xoro xoxo xrdb xrod xxxo xxxx