a-be aaaa aaab aaad aaae aaaf aaap aaar aaba aabb aabd aabp aada aade aaea aaep aafa aafb aafd aaff aapa aara aard aare aarp abaa abab abad abae abaf abap abar abb- abba abbb abbe abbr abda abed abee aber abff abpa abpd abpp abpr abra adaa adab adad adae adap adar adba adda addd adde addr adea adeb adee ader adfa adp- adra adre aeaf aeap aede aeer aer- aera aerd afaa afad afap afar afdb afee afer affa afpa afpe afr- afra afre apap apar apba apbr apda apdd apea aped apep aper apfa appa appd appr apra apre arab arad arae araf arap arar arba arbe arda arde ardf area ared aree aref arep arfa arfb arff arpa arpe arr- arra arre arrr baaa baad baaf baar baba babb babe babr bada badb badd bade badr baed baer baff bapa bape bapp bar- bara barb bard bare barf barr bbad bbbb bbdd bbeb bbpr bd-r bead beaf beap bear beba bebb bebe beda bede beeb beed beef beep beer befa befe beff bera berd bere berr bfpp bpda bpea bprd brab brad brae braf brda brea breb bred bree bref brep brer brrr daab daad daae daap daar daba dabb dabp dada dade daeb daer dafa dafe daff dapa dape dapp dara darb dard dare darf darp darr dbar dbpd dbpf dddd ddre dead deae deaf deap dear deba debe deda dedd dede deeb deed deef deep deer defe deff depa depe depp depr der- dera derb dere derf derp derr dfaf dfer dffa dfrf dpaa dper dppa draa drab drad draf drap drar drba drda drea dred dree dref drra eaaf eaba eada eadb eadd eadp eafb eapp eara earb eard eare earp ebba ebbr ebed eber edad edar edda edde eddp ede- edea eder edfa edra eede eeea eeee eefa eefe eera efab efbr efda effa efpa epaa epad epee eper epfa eppa eppp epra eprb eprp erad eraf erap erba erbb erbe erda erde erdf ereb ered erer erpa erpe erra erre faaa faad faap faba fabd fabe fada fadd fade faeb fafa fafe faff fapa fape fapp fara farb fard fare farp farr fbar fead feaf feap fear feba feda fede feeb feed feer fefe feff fepa fera ferb ferd fere ferr ffar ffee ffff ffrr fpaa fpda fpra fprf frab frad frae frap frea fred free frep frpd paap paar paba pada padd pade paea paep paer pafa pafe paff papa papb pape papp papr par- para pard pare parf parp parr pbar pbed pbpa pbrf pdaf pdea pdfa pdpa pdpr peab peap pear peba ped- peda pede pedf peed peep peer peff pepa pepd pepe per- pera perd pere perf perp perr pfaa pfff pffr pfra ppad ppap ppar pper ppfa pppa pppd pppp pprf prad prae prar pre- preb pred pree pref prep prpd prrd raab raad raaf raba rabb rabe rada radd rade radr raed raef raep raer rafa rafe raff rapa rapd rape rapp rara rarb rare rarf rbaf rbbb rbbr rdap rdbp rder rdfa rea- read reae reaf reap rear reba rebb rebe reda redd rede redr reeb reed reef reep refd refe reff refr repe repp repr rera rerd rere rfae rfef rpdp rrad rred rrrr