bbbb bbdd bbdo bbeb bbrc bcbc bccc bcde bcec bcer bcor bcvo bd-r bdbc bddc bebb bebe bebo bede bedo beeb beed beer beo- beod beor berc berd bere bero berr bevo bobb bobe bobo boce boco bodb bode bodo boec boee boeo boer boob booc bood booe boor bor- bord bore boro borr bove bovo brcb brce brdo breb brec bred bree breo brer brev brob broc brod broe broo bror brrr c-bo c-cd cbbc cbcc cbce cbcr cbdb cbdc cbdo cbec cbee cber cbrd cbre cbvb cbve cbvr ccbc cccb cccc cccv ccdc ccdr cced ccee ccob ccoc ccod ccrc ccre ccvo cd-e cd-r cddb cddr cdec cder cdre cdvd cec- cece ceco cedd cede cedo ceeb ceec ceor cer- cerc cerd cere cero cevo cobb cobe cobo coce coco codd code coed coob cood cor- corb corc cord core coro corr cove covo crbc crcc crce crcr crdc cre- creb crec cred cree creo crob croc crod croe croo cror cvcc cver cvrd cvrr d-bo dbcc dcbc dccb dccc dccv dcdb dcvd dddd ddoc ddrc ddre debe dec- decc decd dece deco dedd dede dedo deeb deed deer deev deor der- derb derc dere dero derr derv deve devo dobb dobe doce doco dod- dodd dode dodo doer doob dood door dorc dord dore doro dorr dove drbc dred dree drev drob drod dvdr dvor ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecdc eced eco- ecod ecrc ecrr ecrv eddc edde eddo ede- eder edoc edod edve eede eeee eeoc eerc eero eocd eode eore erbb erbe ercc erce erde ereb erec ered erer erev erob eroc erod eroe eroo errc erre erro erve evdb ever evoe evoo evre o-eo obbo obec obed ober oboe obor obre obro ocbc occc oce oced ocee ocre ocro ocrr odbo oddd oded odeo oder odoo odor oec- oecc oedo oeec oere oobe oocr ooer oooo oord oore orbb orbe orbo orce orco orde ordo ore- oreb orec ored oreo orer oro- oroe oror orro orve orvr ovde ovee over ovo- ovod ovoo ovre rbbb rbbr rcbc rcbo rccb rccc rcdc rcde rcrd rcvr rder rdev rdoc rebb rebe rebo recc recd rece recr redc redd rede redo redr reeb reed reev reod rerd rere rero revd reve revo rob- robb robe robo rocc roce roco rodd rode rodo roed roer roev roob rood roor rorc rore roro rove rovo rred rrrr rv-c rved rver vbcc vdcc vdec vder vdre vecc vedc vede vedo veer veor ver- verb verd vere vero veve vevo voce vode vodo voer vooc voor vor- vord vore voro vred vreo vroc vver vvob vvvv