-ene bbbb bbch bbdd bbeb bbet bcbc bccc bcde bcec bcet bchd bche bctc bdbc bddc bddh bebb bebe bech bede beeb beed been beet behn bend bene benn bent betc bete beth bett bhcc bhet bnet btcc btdt btec bten bttb c-cd cbbc cbcc cbce cbcn cbct cbdb cbdc cbdn cbec cbee cbet cbnd cbtc ccbc ccbn cccb cccc ccdc ccdh ccdn cced ccee cche ccnb ccnc ccne cctb cctc cctt cd-e cddb cdec cdnb cdnc cec- cece cect cedd cede cedt ceeb ceec cen- cend cene cent cet- cete chce chch cheb chec ched chee cheh chen chet chnb chnc chtt cnbc cndd cnet cntc ctec cten ctne cttn dbcc dbtt dcbc dccb dccc dcct dcdb dche dctc dddd debe debt dec- decc decd dece dect dedd dede deeb deed deen deet dehn dene denn dent dete deth detn dhec dhed dhee dnce dnet dntt dtcc dted dten dthd dtnb ebbc ebcc ebed eben ecbc ecbe eccb eccc ecce ecct ecdc eced eche echt ecne ect- ectc ecth eddc edde ede- edeh eden eede eeee eend eent eetc eete eeth ehcc ehdd eheh ehen ehte enb- enbn ence ench end- ende endh ened enee ennc enne ent- entd ente etbc etcc etch etec etee eten eth- ethe ethn etne ette ettn hbcd hcbc hccb hccc hcch hdtt hebb hebe hech hect hedd hede heeb heed heet hehe hehn hend hene henh henn hent hete heth hett hhhh hnce hndd hntb htcc hten htet nbbc nbcc nbhd ncbc nccc nccn ncct ncdc ncdn ncec nced ncee ncen nchc nchd ncnc ncnd nctc ncte ndcc nddb ndde ndnt ndtc nebb nebe nebn necc nece nech nect nedc nedd nede neeb need neen neet nehe nend nene nenh nent net- netb netd nete neth nett nhcc nheb nhnn nndb nnnn nntn ntbc ntcc nthn ntht ntnd tbcb tbcc tbcd tbce tccc tcdd tch- tche tchh tcnn tctc tddb tech tect tedd tede teec teed teen teet tenb tenc tend tene tenn tent tete teth tett thch the- theb thec thed thee then thet thnt thtb tnbc tncc tndd tneb ttbb ttcn tten tttt