a-be aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aaca aacb aacc aacd aace aacr aada aadc aade aaea aaec aage aara aarc aard aare abaa abab abac abad abae abag abar abb- abba abbb abbe abbr abca abcb abcc abcd abcr abda abec abed abee aber abgd abra abrc acaa acab acac acad acae acag acar acba acca accc accd acce acda acdb acdc acde ace- acea acec aced acer acga acgr acr- acra acrc acre acrr adaa adab adac adad adae adag adar adba adbc adcc adda addc addd adde addr adea adeb adee ader adra adre aeac aecb aede aeer aega aer- aera aerc aerd agac agad agag agar agba agca agcc agce agda agde agea aged agee ager agga agge agra agre arab arac arad arae arag arar arba arbe arc- arca arce arda ardc arde area arec ared aree areg arga argb arge arr- arra arrc arre arrg arrr baaa baad baar baba babb babe babr bac- baca bacc bace bada badb badd bade badr baed baer baga bage bagg bar- bara barb barc bard bare barg barr bbad bbbb bbdd bbeb bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcda bcde bcec bcer bcra bd-r bdbc bddc bead beag bear beba bebb bebe beca beda bede beeb beed beeg beer bega begg bera berc berd bere berg berr bgca brab brac brad brae brag brca brcb brce brda brea breb brec bred bree breg brer brrr c-cd caaa caab caac caba cabe cabg cac- caca cacc cace cacr cada cadc cadd cade cadr caec caer caga cage cagg cagr cara carb carc card care carr cbac cbar cbbc cbca cbcc cbce cbcr cbdb cbdc cbea cbec cbee cber cbga cbgb cbrd cbre ccaa ccab ccac ccad ccag ccar ccba ccbc ccca cccb cccc ccdc ccdr cced ccee ccga ccgc ccra ccrc ccre ccrg 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 cege cer- cera cerc cerd cere cgac cgcc cgcg cged cger crab crac crag crar crbc crca crcc crce crcr crda crdc cre- crea creb crec cred cree creg daab daad daae daag daar daba dabb daca dace dada dade daeb daer daga dage dagg dagr dara darb darc dard dare darg darr dbag 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 deeg deer dega dege der- dera derb derc dere derg derr dgac dgca dgeg dgge draa drab drac drad drag drar drba drbc drca drda drea dred dree dreg drge drra eaba eaca eacc eada eadb eadd eaec eaga eage 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 edag edar edca edda eddc edde ede- edea eder edge edra eeca eede eeea eeee eega eera eerc eerg egaa egad egae egar egba egbe egcc egcg egcr egea egec egee eger eggb egge egra egre erad erba erbb erbe erca ercc erce erda erde ereb erec ered erer erg- erga ergg erra errc erre gaar gaba gabb gabe gabr gace gada gadd gade gaea gaec gaed gaer gaga gage gagg gara garb gard gare garg garr gbag gbde gc-c gcaa gcbc gccc gcda gcrg gdca gddb gdrc geab gead gear geba gebe geca gece geda gedd gede geed geer gege gegg gera gerb gerd gere gggg grab grac grad grae grbr grcc grce grdc grea greb grec gree greg grrr raab raad raag raba rabb rabe rac- raca racc race rada radc radd rade radr raec raed raeg raer raga rage ragg rara rarb rare rbbb rbbr rcac rcbc rccb rccc rcdc rcde rcga rcgc rcrd rcrg rdac rder rea- reac read reae rear reba rebb rebe reca recc recd rece recr reda redc redd rede redr reeb reed rega regd rege regr rera rerd rere rerg rgba rgbe rrad rred rrrr