bbbb bbdd bbdo bbeb bbrc bcbc bccc bcde bcec bcer bcor bd-r bdbc bddc bebb bebe bebo bede bedo beeb beed beer beo- beod beor berc berd bere bero berr bobb bobe bobo boce boco bodb bode bodo boec boee boeo boer boob booc bood booe boor bor- bord bore boro borr brcb brce brdo breb brec bred bree breo brer brob broc brod broe broo bror brrr c-bo c-cd cbbc cbcc cbce cbcr cbdb cbdc cbdo cbec cbee cber cbrd cbre ccbc cccb cccc ccdc ccdr cced ccee ccob ccoc ccod ccrc ccre cd-e cd-r cddb cddr cdec cder cdre cec- cece ceco cedd cede cedo ceeb ceec ceor cer- cerc cerd cere cero cobb cobe cobo coce coco codd code coed coob cood cor- corb corc cord core coro corr crbc crcc crce crcr crdc cre- creb crec cred cree creo crob croc crod croe croo cror d-bo dbcc dcbc dccb dccc dcdb dddd ddoc ddrc ddre debe dec- decc decd dece deco dedd dede dedo deeb deed deer deor der- derb derc dere dero derr dobb dobe doce doco dod- dodd dode dodo doer doob dood door dorc dord dore doro dorr drbc dred dree drob drod ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecdc eced eco- ecod ecrc ecrr eddc edde eddo ede- eder edoc edod eede eeee eeoc eerc eero eocd eode eore erbb erbe ercc erce erde ereb erec ered erer erob eroc erod eroe eroo errc erre erro 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 rbbb rbbr rcbc rcbo rccb rccc rcdc rcde rcrd rder rdoc rebb rebe rebo recc recd rece recr redc redd rede redo redr reeb reed reod rerd rere rero rob- robb robe robo rocc roce roco rodd rode rodo roed roer roob rood roor rorc rore roro rred rrrr