bbbb bbch bbdd bbdo bbeb bbrc bcbc bccc bcde bcec bcer bchd bche bcor bd-r bdbc bddc bddh bebb bebe bebo bech bede bedo beeb beed beer behr beo- beod beor berc berd bere bero berr bhcc bher bhor bobb bobe bobo boce boch boco bodb bode bodh bodo boec boee boeo boer bohd boho bohr boob booc bood booe booh boor bor- bord bore borh boro borr brcb brce brdo breb brec bred bree breo brer brob broc brod broe broh broo bror brrr c-bo c-cd cbbc cbcc cbce cbcr cbdb cbdc cbdo cbec cbee cber cbrd cbre cbrh ccbc cccb cccc ccdc ccdh ccdr cced ccee cche cchr 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 chce chch cheb chec ched chee cheh cher choc chod choh choo chor chrb chrc chrd chro chrr cobb cobe cobh cobo coce coch coco codd code coed coho coob cood cooh cor- corb corc cord core coro corr crbc crcc crce crcr crdc cre- creb crec cred cree creh creo crob croc crod croe croh croo cror d-bo dbcc dcbc dccb dccc dcdb dche dddd ddoc ddrc ddre debe dec- decc decd dece deco dedd dede dedo deeb deed deer deor der- derb derc dere dero derr dhec dhed dhee dher dhod dhor dobb dobe doce doch doco dod- dodd dode dodo doer dohc dohr doob dood door dorc dord dore doro dorr drbc dred dree dreh drob drod droh ebbc ebbo ebbr ebcc ebed eber eboe eboo ebor ebro ecbc ecbe eccb eccc ecce ecco ecdc eced eche echo eco- ecod ecrc ecrr eddc edde eddo ede- edeh eder edoc edod eede eeee eeoc eerc eero ehcc ehdd eheh eher ehre eocd eode eore erbb erbe ercc erce erch erde ereb erec ered erer erhc erob eroc erod eroe eroo errc erre erro hbcd hboc hcbc hccb hccc hcch hcdr hcrd hdoc hdod hebb hebe hebo hebr hech hedd hede hedo heeb heed heer hehe heho heor herb herc herd here hero herr hhhh hobe hobo hoce hoch hocr hode hodh hodr hoed hoer hohe hoho hood hooe hoor horc hord hore horo horr hrdc hree hrob hrod hrrc o-eo obbo obec obed ober oboe obor obre obrh obro ocbc occc oce oced ocee oche ocre ocro ocrr odbo oddd oded odeo oder odoh odoo odor oec- oecc oedo oeec oere ohbe ohcc ohed ohee oher ohho ohob ohoh ohre oobe oocr ooer ooho oooh oooo oord oore orbb orbe orbo orce orch orco orde ordo ore- oreb orec ored oreh oreo orer orhe oro- oroe oror orro rbbb rbbr rboh rcbc rcbo rccb rccc rcdc rcde rchb rcrd rder rdoc rebb rebe rebo recc recd rece rech recr redc redd rede redh redo redr reeb reed rehb rehe reod rerd rere rero rhce rheb rhee rheo rhob rhoc rhod rhoh rob- robb robe robo rocc roce roch roco rodd rode rodo roed roer rohe rohr roob rood roor rorc rore roro rred rrrr