a-be a-ha aaaa aaab aaac aaad aaae aaaf aaah aaar aaba aabb aabc aabd aabh aaca aacb aacc aacd aace aacf aach aacr aada aadc aade aaea aaec aafa aafb aafc aafd aaff aaha aara aarc aard aare abaa abab abac abad abae abaf abar abb- abba abbb abbe abbr abca abcb abcc abcd abcf abch abcr abda abec abed abee aber abff abha abhr abra abrc acaa acab acac acad acae acar acba acca accc accd acce accf acch acda acdb acdc acde acdf ace- acea acec aced aceh acer acfc acfd acfe acha ache achh achr acr- acra acrc acre acrr adaa adab adac adad adae adah adar adba adbc adcc adda addc addd adde addr adea adeb adee adeh ader adfa adfc adha adhd adra adre aeac aeaf aecb aede aeer aer- aera aerc aerd afaa afad afar afca afcb afcc afch afdb afdc afee afer affa affc afr- afra afrc afre ahab ahac ahad ahah ahar ahed ahfa ahha ahra ahrc ahre ahrr arab arac arad arae araf arah arar arba arbe arbh arc- arca arce arch arda ardc arde ardf area arec ared aree aref areh arfa arfb arfc arff arh- arr- arra arrc arre arrh arrr baaa baad baaf baah baar baba babb babe babr bac- baca bacc bace bach bada badb badd bade badh badr baed baer bafc baff baha bahr bar- bara barb barc bard bare barf barh barr bbad bbbb bbch bbdd bbeb bbfc bbrc bcaa bcar bcbc bcca bccc bcda bcde bcec bcer bcfc bchd bche bcra bd-r bdbc bddc bddh bead beaf beah bear beba bebb bebe beca bech beda bede beeb beed beef beer befa befe beff behr bera berc berd bere berr bfca bhar bhca bhcc bher bhff bhra brab brac brad brae braf brah brca brcb brce brda brea breb brec bred bree bref brer brfc brrr c-cd caaa caab caac caaf caah caba cabe cabf cac- caca cacc cace cach cacr cada cadc cadd cade cadr caec caer cafa cafb cafc cafe caff caha cahe cara carb carc card care carf carr cbac cbar cbbc cbca cbcc cbce cbcr cbdb cbdc cbea cbec cbee cbef cber cbfb cbfc cbha cbrd cbre cbrh ccaa ccab ccac ccad ccaf ccar ccba ccbc ccca cccb cccc cccf ccdc ccdf ccdh ccdr cced ccee ccfa ccfc ccfd ccff ccha cche cchr ccra ccrc ccre ccrf cd-e cd-r cdaa cdac cdad cdba cdbf cdda cddb cddr cdec cdef cder cdfa cdfe cdre ceac cead cear ceba cec- ceca cece ceda cedd cede ceeb ceec cef- cefa cefc cer- cera cerc cerd cere cerf cfaa cfab cfac cfae cfar cfbc cfbr cfca cfcb cfcf cfda cffb cffr cfra cfrb cfre chaa chab chac chad chae chaf chah char chca chce chch chea cheb chec ched chee chef cheh cher chfa chfc chfr chha chra chrb chrc chrd chrf chrr crab crac craf crar crbc crca crcc crce crcr crda crdc cre- crea creb crec cred cree creh crfc daab daad daae daar daba dabb daca dace dada dade daeb daer dafa dafc dafe daff daha dahe dara darb darc dard dare darf darr dbar dbcc dbfc dcbc dcca dccb dccc dcdb dcfc dche dcra dddd ddrc ddre deac dead deae deaf dear deba debe dec- deca decc decd dece deda dedd dede deeb deed deef deer defe deff deha der- dera derb derc dere derf derr dfaf dfcc dfer dffa dfrf dhaa dhad dhar dhec dhed dhee dher dhfc draa drab drac drad draf drar drba drbc drca drda drea dred dree dref dreh drfc drra eaaf eaba eabh eaca eacc each eada eadb eadd eaec eafb eara earb eard eare earh ebac ebba ebbc ebbr ebcc ebed eber ebfc ecaa ecac ecad ecar ecbc ecbe ecca eccb eccc ecce ecdc ecdf eced ecef ecfa ecfc ecfr echa eche ecra ecrc ecrf ecrr edac edad edah edar edca edda eddc edde ede- edea edeh eder edfa edra eeca eede eeea eeee eefa eefe eera eerc efab efbr efca efda effa ehaa ehcc ehdd ehea eheh eher ehre erad eraf erba erbb erbe erca ercc erce erch erda erde erdf ereb erec ered erer erfc erhc erra errc erre faaa faac faad faah faba fabd fabe faca facc face fach fada fadd fade faeb fafa fafc fafe faff faha fahd fahr fara farb farc fard fare farr fbar fcab fcar fcba fcca fccf fcch fcda fcra fdca fead feaf fear feba fece fech feda fede feeb feed feer fefc fefe feff fehd fehr fera ferb ferc ferd fere ferr ffar ffcc ffee ffff ffrr frab frac frad frae frbc frcc frea fred free frfc haab haad haaf haar haba habe hace hada hade hadf hadh haec haed hafb hafd hafe haff haha hara harc hard hare harf harh harr hbar hbcd hbfc hcbc hcca hccb hccc hcch hcdr hcfa hcfc hcrd hdca hdda hdfc hdra head heaf heah hear hebb hebe hebr heca hech heda hedd hede heeb heed heef heer hefd hefe hehe hera herb herc herd here herr hfba hfce hhaa hhhh hrac hrad hrdc hree hrfc hrrc raab raad raaf raba rabb rabe rac- raca racc race rach rada radc radd rade radh radr raec raed raef raer rafa rafc rafe raff raha rahe rahr rara rarb rare rarf rbaf rbbb rbbr rcac rcaf rcbc rccb rccc rcdc rcde rcfc rchb rcrd rdac rder rdfa rea- reac read reae reaf rear reba rebb rebe reca recc recd rece rech recr reda redc redd rede redh redr reeb reed reef refd refe reff refr reha rehb rehe rera rerd rere rfae rfef rffc rhae rhce rhea rheb rhee rrad rrah rred rrfc rrrr