-er a-a a-b a-t aaa aab aae aak aar aat ab- aba abb abe abk abr abt aea aeb aee aek aer aet aka akb ake akk akr ar- ara arb are ark arr art at- ata atb ate atr att baa bab bae bak bar bat bba bbb bbe bbk bbr bbt be- bea beb bee bek ber bet bka bkb bke bkk bkr bkt bra brb bre brk brr brt bta btb bte btk btr btt eaa eab eae eak ear eat eba ebb ebe ebk ebr ebt eea eeb eee eek eer eet eka ekb eke ekr ekt era erb ere erk err ert eta etb ete etk etr ett k-t ka- kaa kab kae kak kar kat kba kbb kbe kbk kbr ke- kea keb kee kek ker ket kkb kke kkk kkr kkt kra krk krr krt kta ktb kte ktk ktr ktt ra- raa rab rae rak rar rat rba rbb rbe rbk rbr rbt re- rea reb ree rek rer ret rkb rke rkk rkt rra rrb rrk rrr rrt rta rtb rte rtk rtr rtt taa tab tae tak tar tat tba tbb tbe tbk tbr tbt te- tea teb tee tek ter tet tka tkb tke tkk tkr tkt tra trb tre trk trr trt tta ttb tte ttk ttr ttt

a-ak a-be aaaa aaab aaae aaar aaba aabb aabt aaea aaka aake aara aare aart aata aatk aatt abaa abab abae abak abar abat abb- abba abbb abbe abbr abbt abee aber abet abra abta aeer aeka aer- aera aeta aetr aett akaa akae akar akee aker akka akr- akra akre akte arab arae arak arar arat arba arbe area aree arek aret arka arke arr- arra arre arrk arrr arrt arta arte artr at-t ataa atab atae atak atar atat atea atee ater atka atkt atra atre atrk atta atte attr baaa baak baar baat baba babb babe babr baek baer bak- baka bake bakr bakt bar- bara barb bare bark barr bart bata bate batt bbbb bbeb bbet beak bear beat beba bebb bebe beeb beek beer beet beka beke bera bere berk berr bert beta bete bett brab brae brak brat brea breb bree brek brer bret brka brkb brrr btaa btek btrt bttb eaba eara earb eare eart eata eate ebba ebbr eber eeea eeee eeka eeke eera eeta eete eka- ekab ekeb ekek eker eket ekka ekta erat erba erbb erbe ereb erer eret erke erra erre erta etak etat etbr etee eter etka etra etre etta ette kaaa kaab kaak kaar kaat kaba kabb kabe kabr kaer kaet kaka kake kakk kakt kara karb kare kark karr kart kat- kata katb kate katk katr katt kbaa kbab kbae kbak kbar kbat kbba kbbb kbbe kbbk kbbr kbbt kbeb kbee kbek kber kbet kbkb kbkk kbkr kbra kbrb kbre kbrk kbrt kbta kbtb kbte kbtk kbtr kbtt kea- keak kear keat keba kebb kebe kebr kebt keek keer keet keka kekb keke ker- kera kerb kere kerk kerr kert ket- keta kete ketk ketr kett kkaa kkar kkat kkba kkbb kkbe kkbr kkbt kkea kkkk kkrb kkre kkrk kkrr kkrt kktk krab krae krak krar krat krba krbb krbe krbk krbr krbt krea kreb kree krek kret krka krke krkk krkr krrb krre krrk krrr krrt krta krtk krtr ktaa ktae ktak ktar ktat ktba ktbb ktbr ktbt ktea ktee ktek ktkb ktke ktkk ktkr ktkt ktrb ktre ktrk ktrr ktrt kttk kttr kttt raab raak raat raba rabb rabe rabk raer raka rake rakk rakt rara rarb rare rark rata rate ratk ratt rbbb rbbr rea- reae reak rear reat reba rebb rebe rebk reeb reek reet reka reke rekt rera rere rert reta rete retr rett rrat rrrr rtee taa- taar taat taba tabb tabe taer taka take takk takt tara tarb tare tark tarr tart tata tatb tate tatr tatt tbar tbrb tbta teak tear teat teba teek teer teet teka teke ter- tera tere terk terr teta tete tetr tett traa trab trae trak trat tre- trea tree trek tret trra trte trtr ttab ttbb tter tttt

-aaa- -tree aaaee aaata aabaa aabba aabra aaker aakre abaab ababa ababe abaer abaka abake abara abare abate abbar abbat abbet abear abeat abeba abebe abeer abeet abekr abera abere aberr abert abkar abrak abrar abrek abtaa abtar aeaea aebbe aetat aeter aka-e akaba akare akata akbar akera akert aketa akete akker akkra akrak akrar ar-ab araat arab- araba arabe araea arake arara arare arata arate arbab arbar arbat arbee arber arbet arbre areae arear areat areek areet areka areke arere arete arett arkar arkat arrak arrea arret artar artat artea artek arter ataka atake atara atbar atbat atear ateat ater- aterr atete atrab atrak atree atrek attak attar attea atter attra b-r-k baabe baake baart baata baate babak babar babee babek baber babka babra baert bakar bakea baker bakka bakke bakra baraa barab barak barar barat barba barbe barea barek barer baret bark- barka barke barra barre barta batab batak batar batat batea batek bater batka batra batre batta batte bbart bbbee bbear be-er beara beare beart beata beate bebar bebat bebek beber bebra beebe beeke beete bekaa beker bekka bekke bekra berak berar berat berba berbe berea berek beret berk- berka berke berra berre berta berte betar betee beter betke betra betre bett- betta bette braak braat brake brate bratt break breba breek breer breet breke brera brere brett brrar brrrr btr-t eaker eaket earar eatat eater eatre ebara ebart ebate ebber ebbet ebert eeeee ekata ekker ektar erate erbaa erbar erbbe erber erear erere erkak errat ertar erte erter etate eteke etete etree etrek etter k-rab k-t-b k-tab kaaba kabaa kabab kabak kabar kabat kabba kaber kabta kaera kakae kakar kakka kakke kakra karak karat karee karka karre kart- karta kata- katak katar katat kateb katee katek kater katra katta keare keate kebab kebar kebbe kebek keber kebra keera keere kera- kerar kerat kerek keret kerre kerta ketek keter kette kraak