bbbb bbdd bbeb bbrc bcbc bccc bcde bcec bcer bd-r bdbc bddc bebb bebe bede beeb beed beer berc berd bere berr brcb brce breb brec bred bree brer brrr c-cd cbbc cbcc cbce cbcr cbdb cbdc cbec cbee cber cbrd cbre ccbc cccb cccc ccdc ccdr cced ccee ccrc ccre cd-e cd-r cddb cddr cdec cder cdre cec- cece cedd cede ceeb ceec cer- cerc cerd cere crbc crcc crce crcr crdc cre- creb crec cred cree dbcc dcbc dccb dccc dcdb dddd ddrc ddre debe dec- decc decd dece dedd dede deeb deed deer der- derb derc dere derr drbc dred dree ebbc ebbr ebcc ebed eber ecbc ecbe eccb eccc ecce ecdc eced ecrc ecrr eddc edde ede- eder eede eeee eerc erbb erbe ercc erce erde ereb erec ered erer errc erre rbbb rbbr rcbc rccb rccc rcdc rcde rcrd rder rebb rebe recc recd rece recr redc redd rede redr reeb reed rerd rere rred rrrr