-er a-a a-b a-c a-t aaa aab aac aad aae aar aat ab- aba abb abc abd abe abr abt ac- aca acb acc acd ace acr act ad- ada adb adc add ade adr adt aea aeb aec aed aee aer aet ar- ara arb arc ard are arr art at- ata atb atc atd ate atr att baa bab bac bad bae bar bat bba bbb bbc bbd bbe bbr bbt bca bcb bcc bcd bce bcr bct bda bdb bdc bdd bde bdr bdt be- bea beb bec bed bee ber bet bra brb brd bre brr brt bta btb btc btd bte btr btt c-- caa cab cac cad cae car cat cba cbb cbc cbd cbe cbr cbt cca ccb ccc ccd cce ccr cct cda cdb cdc cdd cde cdr cdt ce- cea ceb cec ced cee cer cet cra crb crc crd cre crr crt cta ctb ctc ctd cte ctr ctt daa dab dac dad dae dar dat dba dbb dbc dbd dbe dbr dbt dca dcb dcc dcd dce dcr dct dda ddb ddc ddd dde ddr ddt de- dea deb dec ded dee der det dra drb drc drd dre drr drt dta dtb dtc dtd dte dtr dtt eaa eab eac ead eae ear eat eba ebb ebc ebd ebe ebr ebt ec- eca ecb ecc ecd ece ecr ect ed- eda edb edc edd ede edr edt eea eeb eec eed eee eer eet era erb erc erd ere err ert eta etb etc etd ete etr ett ra- raa rab rac rad rae rar rat rba rbb rbc rbd rbe rbr rbt rca rcb rcc rcd rce rcr rct rda rdb rdc rdd rde rdr rdt re- rea reb rec red ree rer ret rra rrb rrc rrd rrr rrt rta rtb rtc rtd rte rtr rtt taa tab tac tad tae tar tat tba tbb tbc tbd tbe tbr tbt tca tcb tcc tcd tce tcr tct tda tdb tdc tdd tde tdr tdt te- tea teb tec ted tee ter tet tra trb trc trd tre trr trt tta ttb ttc ttd tte ttr ttt

a-be aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aacr aact aada aadc aade aadt aaea aaec aara aarc aard aare aart aata aatc aatt abaa abab abac abad abae abar abat abb- abba abbb abbe abbr abbt abca abcb abcc abcd abcr abct abda abec abed abee aber abet abra abrc abta ac-t acaa acab acac acad acae acar acat acba acca accc accd acce acct acda acdb acdc acde acdt ace- acea acec aced acer acet acr- acra acrc acre acrr acta actc acte actt adaa adab adac adad adae adar adat adba adbc adcc adda addc addd adde addr adea adeb adee ader adet adra adre adta aeac aecb aect aede aedt aeer aer- aera aerc aerd aeta aetc aetr aett arab arac arad arae arar arat arba arbe arc- arca arce arct arda ardc arde area arec ared aree aret arr- arra arrc arre arrr arrt arta artc arte artr at-t ataa atab atac atad atae atar atat atca atcc atcr atdt atea atec ated atee ater atra atrc atre atta atte attr baaa baad baar baat baba babb babe babr bac- baca bacc bace bact bada badb badd bade badr baed baer bar- bara barb barc bard bare barr bart bata batc bate batt bbad bbbb bbdd bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcda bcde bcec bcer bcet bcra bctc bd-r bdbc bddc bead bear beat beba bebb bebe beca beda bede beeb beed beer beet bera berc berd bere berr bert beta betc bete bett brab brac brad brae brat brca brcb brce brda brdt brea breb brec bred bree brer bret brrr brtc btaa btcc btdt btec btrc btrt bttb c-cd caaa caab caac caat caba cabe cac- caca cacc cace cacr cada cadc cadd cade cadr caec caer cara carb carc card care carr cart cat- cata catb catc catd cate catt cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbdb cbdc cbea cbec cbee cber cbet cbrd cbre cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc ccdc ccdr cced ccee ccra ccrc ccre ccrt cctb cctc cctt cd-e cd-r cdaa cdac cdad cdba cdda cddb cddr cdec cder cdre ceac cead cear ceat ceba cec- ceca cece cect ceda cedd cede cedt ceeb ceec cer- cera cerc cerd cere cert cet- ceta cete crab crac crar crat crbc crca crcc crce crcr crda crdc cre- crea creb crec cred cree cret crrt crtc ctab ctae ctba ctca ctec ctrc ctta daab daad daae daar daba dabb dabt daca dace dact dada dade daeb daer dara darb darc dard dare darr dart data date datr datt dbar dbcc dbtt dcbc dcca dccb dccc dcct dcdb dcra dctc dddd ddrc ddre deac dead deae dear deba debe debt dec- deca decc decd dece dect deda dedd dede deeb deed deer deet der- dera derb derc dere derr deta dete detr draa drab drac drad drar drat drba drbc drca drda drea dred dree dret drra dtaa dtac dtcc dted eaba eaca eacc eada eadb eadd eaec eara earb eard eare eart eata eate ebac ebba ebbc ebbr ebcc ebed eber ecaa ecac ecad ecar ecat ecbc ecbe ecca eccb eccc ecce ecct ecdc eced ecra ecrc ecrr ect- ecta ectc edac edad edar edca edda eddc edde ede- edea eder edra edta eeca eede eeea eeee eera eerc eeta eetc eete erad erat erba erbb erbe erca ercc erce erda erde ereb erec ered erer eret erra errc erre erta etat etbc etbr etcc etec etee eter etra etre etta ette raab raad raat raba rabb rabe rac- raca racc race ract rada radc radd rade radr radt raec raed raer rara rarb rare rata rate ratt rbbb rbbr rcac rcbc rccb rccc rcdc rcde