a-be aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aaca aacb aacc aacd aace aacr aada aadc aade aaea aaec aara aarc aard aare abaa abab abac abad abae abar abb- abba abbb abbe abbr abca abcb abcc abcd abcr abda abec abed abee aber abra abrc acaa acab acac acad acae acar acba acca accc accd acce acda acdb acdc acde ace- acea acec aced acer acr- acra acrc acre acrr adaa adab adac adad adae adar adba adbc adcc adda addc addd adde addr adea adeb adee ader adra adre aeac aecb aede aeer aer- aera aerc aerd arab arac arad arae arar arba arbe arc- arca arce arda ardc arde area arec ared aree arr- arra arrc arre arrr baaa baad baar baba babb babe babr bac- baca bacc bace bada badb badd bade badr baed baer bar- bara barb barc bard bare barr bbad bbbb bbdd bbeb bbrc bcaa bcar bcbc bcca bccc bcda bcde bcec bcer bcra bd-r bdbc bddc bead bear beba bebb bebe beca beda bede beeb beed beer bera berc berd bere berr brab brac brad brae brca brcb brce brda brea breb brec bred bree brer brrr c-cd caaa caab caac caba cabe cac- caca cacc cace cacr cada cadc cadd cade cadr caec caer cara carb carc card care carr cbac cbar cbbc cbca cbcc cbce cbcr cbdb cbdc cbea cbec cbee cber cbrd cbre ccaa ccab ccac ccad ccar ccba ccbc ccca cccb cccc ccdc ccdr cced ccee ccra ccrc ccre cd-e cd-r cdaa cdac cdad cdba cdda cddb cddr cdec cder cdre ceac cead cear ceba cec- ceca cece ceda cedd cede ceeb ceec cer- cera cerc cerd cere crab crac crar crbc crca crcc crce crcr crda crdc cre- crea creb crec cred cree daab daad daae daar daba dabb daca dace dada dade daeb daer dara darb darc dard dare darr dbar dbcc dcbc dcca dccb dccc dcdb dcra dddd ddrc ddre deac dead deae dear deba debe dec- deca decc decd dece deda dedd dede deeb deed deer der- dera derb derc dere derr draa drab drac drad drar drba drbc drca drda drea dred dree drra eaba eaca eacc eada eadb eadd eaec eara earb eard eare ebac ebba ebbc ebbr ebcc ebed eber ecaa ecac ecad ecar ecbc ecbe ecca eccb eccc ecce ecdc eced ecra ecrc ecrr edac edad edar edca edda eddc edde ede- edea eder edra eeca eede eeea eeee eera eerc erad erba erbb erbe erca ercc erce erda erde ereb erec ered erer erra errc erre raab raad raba rabb rabe rac- raca racc race rada radc radd rade radr raec raed raer rara rarb rare rbbb rbbr rcac rcbc rccb rccc rcdc rcde rcrd rdac rder rea- reac read reae rear reba rebb rebe reca recc recd rece recr reda redc redd rede redr reeb reed rera rerd rere rrad rred rrrr