-er a-a a-b a-c aaa aab aac aae aaf aah aar ab- aba abb abc abe abf abh abr ac- aca acb acc ace acf ach acr aea aeb aec aee aef aeh aer af- afa afb afc afe aff afh afr aha ahb ahc ahe ahf ahh ahr ar- ara arb arc are arf arh arr baa bab bac bae baf bah bar bba bbb bbc bbe bbf bbh bbr bca bcb bcc bce bcf bch bcr be- bea beb bec bee bef beh ber bfa bfb bfc bfe bff bfh bfr bha bhb bhc bhe bhf bhh bhr bra brb bre brf brh brr c-- caa cab cac cae caf cah car cba cbb cbc cbe cbf cbh cbr cca ccb ccc cce ccf cch ccr ce- cea ceb cec cee cef ceh cer cfa cfb cfc cfe cff cfh cfr ch- cha chb chc che chf chh chr cra crb crc cre crf crh crr eaa eab eac eae eaf eah ear eba ebb ebc ebe ebf ebh ebr ec- eca ecb ecc ece ecf ech ecr eea eeb eec eee eef eer ef- efa efb efc efe eff efh efr eha ehb ehc ehe ehf ehh ehr era erb erc ere erf erh err faa fab fac fae faf fah far fba fbb fbc fbe fbf fbh fbr fca fcb fcc fce fcf fcr fea feb fec fee fef feh fer ffa ffc ffe fff ffh ffr fha fhb fhc fhe fhf fhh fhr fra frb frc fre frf frh frr haa hab hac hae haf hah har hba hbb hbc hbe hbf hbh hbr hca hcb hcc hce hcf hch hcr he- hea heb hec hee hef heh her hfa hfb hfc hfe hff hfh hfr hha hhb hhc hhe hhf hhh hhr hr- hra hrb hrc hre hrf hrh hrr ra- raa rab rac rae raf rah rar rba rbb rbc rbe rbf rbh rbr rca rcb rcc rce rcf rch rcr re- rea reb rec ree ref reh rer rfa rfb rfc rfe rff rfh rfr rh- rha rhb rhc rhe rhf rhh rhr rra rrb rrc rrf rrh rrr

a-be a-ha aaaa aaab aaac aaae aaaf aaah aaar aaba aabb aabc aabh aaca aacb aacc aace aacf aach aacr aaea aaec aafa aafb aafc aaff aaha aara aarc aare abaa abab abac abae abaf abar abb- abba abbb abbe abbr abca abcb abcc abcf abch abcr abec abee aber abff abha abhr abra abrc acaa acab acac acae acar acba acca accc acce accf acch ace- acea acec aceh acer acfc acfe acha ache achh achr acr- acra acrc acre acrr aeac aeaf aecb aeer aer- aera aerc afaa afar afca afcb afcc afch afee afer affa affc afr- afra afrc afre ahab ahac ahah ahar ahfa ahha ahra ahrc ahre ahrr arab arac arae araf arah arar arba arbe arbh arc- arca arce arch area arec aree aref areh arfa arfb arfc arff arh- arr- arra arrc arre arrh arrr baaa baaf baah baar baba babb babe babr bac- baca bacc bace bach baer bafc baff baha bahr bar- bara barb barc bare barf barh barr bbbb bbch bbeb bbfc bbrc bcaa bcar bcbc bcca bccc bcec bcer bcfc bche bcra beaf beah bear beba bebb bebe beca bech beeb beef beer befa befe beff behr bera berc bere berr bfca bhar bhca bhcc bher bhff bhra brab brac brae braf brah brca brcb brce brea breb brec bree bref brer brfc brrr caaa caab caac caaf caah caba cabe cabf cac- caca cacc cace cach cacr caec caer cafa cafb cafc cafe caff caha cahe cara carb carc care carf carr cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cbef cber cbfb cbfc cbha cbre cbrh ccaa ccab ccac ccaf ccar ccba ccbc ccca cccb cccc cccf ccee ccfa ccfc ccff ccha cche cchr ccra ccrc ccre ccrf ceac cear ceba cec- ceca cece ceeb ceec cef- cefa cefc cer- cera cerc cere cerf cfaa cfab cfac cfae cfar cfbc cfbr cfca cfcb cfcf cffb cffr cfra cfrb cfre chaa chab chac chae chaf chah char chca chce chch chea cheb chec chee chef cheh cher chfa chfc chfr chha chra chrb chrc chrf chrr crab crac craf crar crbc crca crcc crce crcr cre- crea creb crec cree creh crfc eaaf eaba eabh eaca eacc each eaec eafb eara earb eare earh ebac ebba ebbc ebbr ebcc eber ebfc ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecef ecfa ecfc ecfr echa eche ecra ecrc ecrf ecrr eeca eeea eeee eefa eefe eera eerc efab efbr efca effa ehaa ehcc ehea eheh eher ehre eraf erba erbb erbe erca ercc erce erch ereb erec erer erfc erhc erra errc erre faaa faac faah faba fabe faca facc face fach faeb fafa fafc fafe faff faha fahr fara farb farc fare farr fbar fcab fcar fcba fcca fccf fcch fcra feaf fear feba fece fech feeb feer fefc fefe feff fehr fera ferb ferc fere ferr ffar ffcc ffee ffff ffrr frab frac frae frbc frcc frea free frfc haab haaf haar haba habe hace haec hafb hafe haff haha hara harc hare harf harh harr hbar hbfc hcbc hcca hccb hccc hcch hcfa hcfc heaf heah hear hebb hebe hebr heca hech heeb heef heer hefe hehe hera herb herc here herr hfba hfce hhaa hhhh hrac hree hrfc hrrc raab raaf raba rabb rabe rac- raca racc race rach raec raef raer rafa rafc rafe raff raha rahe rahr rara rarb rare rarf rbaf rbbb rbbr rcac rcaf rcbc rccb rccc rcfc rchb rea- reac reae reaf rear reba rebb rebe reca recc rece rech recr reeb reef refe reff refr reha rehb rehe rera rere rfae rfef rffc rhae rhce rhea rheb rhee rrah rrfc rrrr

-aaa- aaaah aaace aaaee aaarc aabaa aabba aabra aacbc aaeaf aahaa aarah aarch abaab ababa ababe abaca abaer abara abare abbac abbar abccc abear abeba abebe abece abeer