-er a-a a-b aaa aab aae aaf aag aak aar ab- aba abb abe abf abg abk abr aea aeb aee aef aeg aek aer af- afa afb afe aff afg afk afr ag- aga agb age agf agg agk agr aka akb ake akg akk akr ar- ara arb are arf arg ark arr baa bab bae baf bag bak bar bba bbb bbe bbf bbg bbk bbr be- bea beb bee bef beg bek ber bfa bfb bfe bff bfg bfr bga bgb bge bgf bgg bgk bgr bka bkb bke bkf bkg bkk bkr bra brb bre brf brg brk brr eaa eab eae eaf eag eak ear eba ebb ebe ebf ebg ebk ebr eea eeb eee eef eeg eek eer ef- efa efb efe eff efg efr ega egb ege egf egg egr eka ekb eke ekf ekg ekr era erb ere erf erg erk err faa fab fae faf fag fak far fba fbb fbe fbf fbg fbk fbr fea feb fee fef feg fek fer ffa ffe fff ffg ffk ffr fga fgb fge fgf fgg fgr fka fkb fkf fkg fkk fra frb fre frf frg frk frr gaa gab gae gaf gag gak gar gba gbe gbf gbg gbk gbr ge- gea geb gee gef geg gek ger gfa gfb gfe gff gfk gfr gga ggb ggg ggr gka gkb gra grb gre grf grg grk grr ka- kaa kab kae kaf kag kak kar kba kbb kbe kbf kbk kbr ke- kea keb kee kef keg kek ker kfa kff kfg kga kgb kgf kkb kke kkk kkr kra krf krg krk krr ra- raa rab rae raf rag rak rar rba rbb rbe rbf rbg rbk rbr re- rea reb ree ref reg rek rer rfa rfb rfe rff rfg rfk rfr rga rgb rge rgf rgg rgk rgr rkb rke rkf rkg rkk rra rrb rrf rrg rrk rrr

a-ak a-be aaaa aaab aaae aaaf aaar aaba aabb aaea aafa aafb aaff aage aaka aake aara aare abaa abab abae abaf abag abak abar abb- abba abbb abbe abbr abee aber abff abra aeaf aeer aega aeka aer- aera afaa afak afar afee afek afer affa afgf afka afkr afr- afra afre agag agar agba agea agee ager agfa agga agge agra agre akaa akae akar akee akeg aker akka akr- akra akre arab arae araf arag arak arar arba arbe area aree aref areg arek arfa arfb arff arga argb arge arka arke arr- arra arre arrg arrk arrr baaa baaf baak baar baba babb babe babr baek baer baff baga bage bagg bak- baka bake bakr bar- bara barb bare barf barg bark barr bbbb bbeb bbga bbrg beaf beag beak bear beba bebb bebe beeb beef beeg beek beer befa befe beff bega begg beka beke bera bere berg berk berr bfgf brab brae braf brag brak brea breb bree bref breg brek brer brka brkb brrr eaaf eaba eafb eaga eage eara earb eare ebba ebbr eber eeea eeee eefa eefe eega eeka eeke eera eerg ef-g efab efbr effa efke egaa egae egar egba egbe egea egee eger egfr eggb egge egra egre eka- ekab ekeb ekek eker ekka eraf erba erbb erbe ereb erer erg- erga ergg erke erra erre f--k faaa faba fabe faeb fafa fafe faff fafg fage fagg fake fara farb fare farg fark farr fbar feaf feak fear feba feeb feek feer fefe feff fege fegg feke fera ferb fere ferk ferr ffar ffee ffff ffrr fkab frab frae frag frak frea free gaar gaba gabb gabe gabr gaea gaer gafa gafb gaff gaga gage gagg gara garb gare garf garg garr gbag geab gear geba gebe geek geer gefe gege gegg gera gerb gere gfer gffa ggfg gggg grab grae graf grbr grea greb gree gref greg grfa grrr kaaa kaab kaaf kaag kaak kaar kaba kabb kabe kabf kabg kabr kaer kafa kafe kaff kafr kag- kaga kagb kage kagg kagr kaka kake kakk kara karb kare karf karg kark karr kbaa kbab kbae kbak kbar kbba kbbb kbbe kbbf kbbg kbbk kbbr kbeb kbee kbef kbek kber kbfb kbff kbfk kbfr kbga kbgb kbge kbgg kbgr kbkb kbkf kbkg kbkk kbkr kbra kbrb kbre kbrf kbrg kbrk kea- keag keak kear keba kebb kebe kebr keef keek keer kefa kefb keff kefr kega kege kegg kegk kegr keka kekb keke ker- kera kerb kere kerf kerk kerr kfab kfar kfbk kfeb kfeg kfer kffa kffb kfff kffg kffk kfge kfgr kfka kfkb kfra kfre kfrg kfrr kgab kgaf kgak kgba kgbb kgbr kgeb kgfa kgff kgfk kgga kggf kggg kggr kgra kgrb kgre kgrg kgrk kgrr kkaa kkag kkar kkba kkbb kkbe kkbg kkbr kkea kkeg kkfg kkfr kkgb kkgr kkkk kkrb kkre kkrf kkrk kkrr krab krae krag krak krar krba krbb krbe krbg krbk krbr krea kreb kree kref krek krfe krff krfg krka krke krkk krkr krrb krre krrf krrg krrk krrr raab raaf raag raak raba rabb rabe rabk raef raeg raer rafa rafe raff raga rage ragg raka rake rakk rara rarb rare rarf rark rbaf rbbb rbbr rea- reae reaf reak rear reba rebb rebe rebk reeb reef reek refe reff refg refr rega rege regr reka reke rera rere rerg rfae rfef rgba rgbe rkkf rrrr

-aaa- aaaee aaarg aabaa aabba aabga aabra aaeaf aaker aakre abaab ababa ababe abaer abaga abaka abake abara abare abbar abear abeba abebe abeer abega abege abegg abekr abera abere aberg aberr abfab abgar abkar abrak abrar abrek aeaea aebbe aegae aegea aeger afara afare afear afefe afega afeka afere affer afgar afree agafa agara agege aggag aggar agger agree aka-e akaba akare akbar akera akker akkra akrak akrar ar-ab arab- araba arabe araea arage arake arara arare arbab arbar arbee arber arbre areae arear areef areek arega areka areke arere arfe arkar arrak arrea b-r-k baabe baake babak babar babee babek baber babka babra baffa bafra bagag bagar bagea bager bagga