bbbb bbdd bbdo bbeb bbfc bbrc bcbc bccc bcde bcec bcer bcfc bcof bcor bd-r bdbc bddc bebb bebe bebo bede bedo beeb beed beef beer befe beff befo beo- beod beof beor berc berd bere bero berr bobb bobe bobo boce boco bodb bode bodo boec boee boef boeo boer bofd bofe boff boob booc bood booe boof boor bor- bord bore borf boro borr brcb brce brdo breb brec bred bree bref breo brer brfc brob broc brod broe broo bror brrr c-bo c-cd cbbc cbcc cbce cbcr cbdb cbdc cbdo cbec cbee cbef cber cbfb cbfc cbrd cbre ccbc cccb cccc cccf ccdc ccdf ccdr cced ccee ccfc ccfd ccff ccob ccoc ccod ccrc ccre ccrf cd-e cd-r cdbf cddb cddr cdec cdef cder cdfe cdre cec- cece ceco cedd cede cedo ceeb ceec cef- cefc ceor cer- cerc cerd cere cerf cero cfbc cfbr cfcb cfcf cfco cffb cffr cfor cfrb cfre cobb cobe cobo coce coco codd code coed cofc cofe coff coob cood coof cor- corb corc cord core corf coro corr crbc crcc crce crcr crdc cre- creb crec cred cree creo crfc crob croc crod croe croo cror d-bo dbcc dbfc dbfo dcbc dccb dccc dcdb dcfc dddd ddoc ddrc ddre debe dec- decc decd dece deco dedd dede dedo deeb deed deef deer defe deff defo deor der- derb derc dere derf dero derr dfcc dfco dfer dfoe dfrf dobb dobe doce doco dod- dodd dode dodo doer doff doob dood doof door dorc dord dore dorf doro dorr drbc dred dree dref drfc drob drod drof ebbc ebbo ebbr ebcc ebed eber ebfc eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecdc ecdf eced ecef ecfc ecfr eco- ecod ecrc ecrf ecrr eddc edde eddo ede- eder edoc edod eede eeee eefe eeoc eerc eero efbr efco efeo efor eocd eode eore erbb erbe ercc erce erde erdf ereb erec ered erer erfc erob eroc erod eroe eroo errc erre erro fccf fdoc febo fece fede feeb feed feer fefc fefe feff fefo feod feof ferb ferc ferd fere fero ferr ffcc ffee ffff ffrr foce foco fode foed foer fofo food foof for- forb ford fore foro forr frbc frcc fred free freo frfc frob froe o-eo obbo obec obed ober oboe obor obre obro ocbc occc oce oced ocee ocef ocre ocro ocrr odbo oddd oded odeo oder odoo odor oec- oecc oedo oeec oere ofcr ofdr ofer off- offc offe offo offr ofor ofre oobe oocr ooer ooff oooo oord oore orbb orbe orbo orce orco orde ordo ore- oreb orec ored oreo orer orfe orff oro- oroe orof oror orro rbbb rbbr rcbc rcbo rccb rccc rcdc rcde rcfc rcrd rder rdoc rebb rebe rebo recc recd rece recr redc redd rede redo redr reeb reed reef refd refe reff refr reod reof rerd rere rero rfef rffc rob- robb robe robo rocc roce roco rodd rode rodo roed roer rofc rofe roff rofo roob rood roof roor rorc rore roro rred rrfc rrrr