-er a-a a-b a-c a-t a-z aaa aab aac aae aar aat aaz ab- aba abb abc abe abr abt abz ac- aca acb acc ace acr act acz aea aeb aec aee aer aet aez ar- ara arb arc are arr art arz at- ata atb atc ate atr att atz az- aza azb aze azt azz baa bab bac bae bar bat baz bba bbb bbc bbe bbr bbt bca bcb bcc bce bcr bct bcz be- bea beb bec bee ber bet bez bra brb bre brr brt brz bta btb btc bte btr btt btz bza bze bzr bzz c-- caa cab cac cae car cat caz cba cbb cbc cbe cbr cbt cbz cca ccb ccc cce ccr cct ccz ce- cea ceb cec cee cer cet cez cra crb crc cre crr crt crz cta ctb ctc cte ctr ctt ctz cz- czc cze czt eaa eab eac eae ear eat eaz eba ebb ebc ebe ebr ebt ec- eca ecb ecc ece ecr ect eea eeb eec eee eer eet era erb erc ere err ert erz eta etb etc ete etr ett etz eze ezr ezz ra- raa rab rac rae rar rat raz rba rbb rbc rbe rbr rbt rca rcb rcc rce rcr rct re- rea reb rec ree rer ret rez rra rrb rrc rrr rrt rta rtb rtc rte rtr rtt rtz rza rzb rze taa tab tac tae tar tat taz tba tbb tbc tbe tbr tbt tbz tca tcb tcc tce tcr tct te- tea teb tec tee ter tet tez tra trb trc tre trr trt trz tta ttb ttc tte ttr ttt tza tze zaa zab zac zar zat zaz zbb zbc zbr zbt zce zea zeb zec zee zer zet zez zta zte ztr zzr zzt zzz

a-be aaaa aaab aaac aaae aaar aaba aabb aabc aabt aaca aacb aacc aace aacr aact aaea aaec aara aarc aare aart aata aatc aatt abaa abab abac abae abar abat abb- abba abbb abbe abbr abbt abca abcb abcc abcr abct abec abee aber abet abez abra abrc abta abza ac-t acaa acab acac acae acar acat acba acca accc acce acct ace- acea acec acer acet acr- acra acrc acre acrr acta actc acte actt aeac aecb aect aeer aer- aera aerc aeta aetc aetr aett arab arac arae arar arat arba arbe arc- arca arce arct area arec aree aret arr- arra arrc arre arrr arrt arta artc arte artr artz arza at-t ataa atab atac atae atar atat atca atcc atcr atea atec atee ater atez atra atrc atre atta atte attr aza- azab azar azat azaz azca azer azet azra azza baaa baar baat baaz baba babb babe babr bac- baca bacc bace bact bacz baer baez bar- bara barb barc bare barr bart barz bata batc bate batt batz baza baze bbbb bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcec bcer bcet bcra bctc bear beat beba bebb bebe beca beeb beer beet bera berc bere berr bert beta betc bete bett betz beze brab brac brae brat braz brca brcb brce brea breb brec bree brer bret brez brrr brtc brza btaa btcc btec btrc btrt bttb bzer bzzt bzzz caaa caab caac caat caba cabe cac- caca cacc cace cacr caec caer cara carb carc care carr cart cat- cata catb catc cate catt catz caza caze cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbea cbec cbee cber cbet cbre cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc ccee ccra ccrc ccre ccrt cctb cctc cctt ceac cear ceat ceba cec- ceca cece cect ceeb ceec cer- cera cerc cere cert cet- ceta cete ceza ceze crab crac crar crat crbc crca crcc crce crcr crcz cre- crea creb crec cree cret crrt crtc ctab ctae ctba ctca ctec ctrc ctta czar eaba eaca eacc eaec eara earb eare eart eata eate ebac ebba ebbc ebbr ebcc eber ecaa ecac ecar ecat ecbc ecbe ecca eccb eccc ecce ecct ecra ecrc ecrr ect- ecta ectc eeca eeea eeee eera eerc eeta eetc eete eeze erat eraz erba erbb erbe erca ercc erce ereb erec erer eret erez erra errc erre erta ertz etat etbc etbr etcc etec etee eter etra etre etta ette ezer ezra raab raat raaz raba rabb rabe rac- raca racc race ract raec raer rara rarb rare rarz rata rate ratt ratz raza raze razr razz rbbb rbbr rcac rcbc rccb rccc rcet rctc rea- reac reae rear reat reba rebb rebe reca recc rece recr rect recz reeb reet rera rere rert reta rete retr rett retz reza reze rrat rrrr rtca rtcc rtce rtee rzab taa- taar taat taba tabb tabc tabe taca tacc tace tact taec taer tara tarb tarc tare tarr tart tata tatb tate tatr tatt tatz taza taze tazr tazz tbar tbca tbcb tbcc tbce tbrb tbta tcca tccc tctc teac tear teat teaz teba teca tecr tect teec teer teet teez ter- tera terc tere terr teta tete tetr tett tetz teza tezz traa trab trac trae trat traz trca trcc tre- trea trec tree tret trez trra trtc trte trtr ttab ttbb tter tttt tzar tzzt zaar zaat zaba zabr zaca zaer zara zarb zare zarr zaza zbar zber zcar zcta zeae zeba zebe zeca zera zert zeta zete zeze zrce zrze zzzz

-aaa- -tree aaace aaaee aaarc aaata aabaa aabba aabra aacbc aacte abaab ababa ababe abaca abaer abara abare abate abaza abbac abbar abbat abbet abccc abear abeat abeba abebe abece abeer abeet abera abere aberr abert abetz abrac abrar abtaa abtar abzac abzar acaca acacb acar- acara acare acate accra aceae acera acerb acet- aceta acrab acrea acree act-r actar acter actra aeaea aebbe aetat aeter ar-ab ara-c araat arab- araba arabe araca arace araea arara arare arata arate aratz arbab arbar arbat arbaz arbee arber arbet arbre arcae arcee arct- arcte areae arear