-er a-a a-b a-t aaa aab aae aag aak aar aat ab- aba abb abe abg abk abr abt aea aeb aee aeg aek aer aet ag- aga agb age agg agk agr agt aka akb ake akg akk akr ar- ara arb are arg ark arr art at- ata atb ate atg atr att baa bab bae bag bak bar bat bba bbb bbe bbg bbk bbr bbt be- bea beb bee beg bek ber bet bga bgb bge bgg bgk bgr bgt bka bkb bke bkg bkk bkr bkt bra brb bre brg brk brr brt bta btb bte btg btk btr btt eaa eab eae eag eak ear eat eba ebb ebe ebg ebk ebr ebt eea eeb eee eeg eek eer eet ega egb ege egg egr egt eka ekb eke ekg ekr ekt era erb ere erg erk err ert eta etb ete etg etk etr ett gaa gab gae gag gak gar gat gba gbe gbg gbk gbr gbt ge- gea geb gee geg gek ger get gga ggb ggg ggr ggt gka gkb gkt gra grb gre grg grk grr grt gta gtb gte gtg gtk gtr gtt k-t ka- kaa kab kae kag kak kar kat kba kbb kbe kbk kbr ke- kea keb kee keg kek ker ket kga kgb kkb kke kkk kkr kkt kra krg krk krr krt kta ktb kte ktg ktk ktr ktt ra- raa rab rae rag rak rar rat rba rbb rbe rbg rbk rbr rbt re- rea reb ree reg rek rer ret rga rgb rge rgg rgk rgr rgt rkb rke rkg rkk rkt rra rrb rrg rrk rrr rrt rta rtb rte rtg rtk rtr rtt taa tab tae tag tak tar tat tba tbb tbe tbg tbk tbr tbt te- tea teb tee teg tek ter tet tga tgb tge tgg tgk tgr tgt tka tkb tke tkg tkk tkr tkt tra trb tre trg trk trr trt tta ttb tte ttg ttk ttr ttt

a-ak a-be aaaa aaab aaae aaar aaba aabb aabt aaea aage aaka aake aara aare aart aata aatk aatt abaa abab abae abag abak abar abat abb- abba abbb abbe abbr abbt abee aber abet abra abta aeer aega aeka aer- aera aeta aetr aett agag agar agat agba agea agee ager aget agga agge agra agre agta agte agtr akaa akae akar akee akeg aker akka akr- akra akre akte arab arae arag arak arar arat arba arbe area aree areg arek aret arga argb arge arka arke arr- arra arre arrg 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 baga bage bagg bagt bak- baka bake bakr bakt bar- bara barb bare barg bark barr bart bata bate batt bbbb bbeb bbet bbga bbrg beag beak bear beat beba bebb bebe beeb beeg beek beer beet bega begg beka beke bera bere berg berk berr bert beta bete bett brab brae brag brak brat brea breb bree breg brek brer bret brka brkb brrr btaa btek btrt bttb eaba eaga eage eara earb eare eart eata eate ebba ebbr eber eeea eeee eega eeka eeke eera eerg eeta eete egaa egae egar egat egba egbe egea egee eger eggb egge egra egre egta egte egtk eka- ekab ekeb ekek eker eket ekka ekta erat erba erbb erbe ereb erer eret erg- erga ergg erke erra erre erta etag etak etat etbr etee eter etka etra etre etta ette gaar gaba gabb gabe gabr gabt gaea gaer gaga gage gagg gara garb gare garg garr gart gata gate gatr gatt gbag geab gear geat geba gebe geek geer geet gege gegg gera gerb gere gert geta getb gete getg getk gett ggbt gggg grab grae grat grbr grea greb gree greg gret grrr gtaa gtbr gtea gtta kaaa kaab kaag kaak kaar kaat kaba kabb kabe kabg kabr kaer kaet kag- kaga kagb kage kagg kagr kagt kaka kake kakk kakt kara karb kare karg kark karr kart kat- kata katb kate katg katk katr katt kbaa kbab kbae kbak kbar kbat kbba kbbb kbbe kbbg kbbk kbbr kbbt kbeb kbee kbek kber kbet kbga kbgb kbge kbgg kbgr kbgt kbkb kbkg kbkk kbkr kbra kbrb kbre kbrg kbrk kbrt kbta kbtb kbte kbtk kbtr kbtt kea- keag keak kear keat keba kebb kebe kebr kebt keek keer keet kega kege kegg kegk kegr keka kekb keke ker- kera kerb kere kerk kerr kert ket- keta kete ketk ketr kett kgab kgak kgba kgbb kgbr kgbt kgeb kget kgga kggg kggr kgra kgrb kgre kgrg kgrk kgrr kgrt kgtk kkaa kkag kkar kkat kkba kkbb kkbe kkbg kkbr kkbt kkea kkeg kkgb kkgr kkkk kkrb kkre kkrk kkrr kkrt kktk krab krae krag krak krar krat krba krbb krbe krbg krbk krbr krbt krea kreb kree krek kret krgt krka krke krkk krkr krrb krre krrg krrk krrr krrt krta krtk krtr ktaa ktae ktag ktak ktar ktat ktba ktbb ktbg ktbr ktbt ktea ktee kteg ktek ktga ktge ktgg ktgr ktkb ktke ktkk ktkr ktkt ktrb ktre ktrg ktrk ktrr ktrt kttg kttk kttr kttt raab raag raak raat raba rabb rabe rabk raeg raer raga rage ragg 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 rega rege regr regt reka reke rekt rera rere rerg rert reta rete retr rett rgba rgbe rgtr rrat rrrr rtee rtkg taa- taag taar taat taba tabb tabe taer taga tage tagg taka take takk takt tara tarb tare targ tark tarr tart tata tatb tate tatr tatt tbar tbrb tbta teak tear teat teba teek teer teet tega tegg tegt teka teke ter- tera tere terk terr teta tete tetr tett tkkg traa trab trae trag trak trat tre- trea tree treg