-er a-a a-b a-c aaa aab aac aae aak aar aav ab- aba abb abc abe abk abr abv ac- aca acb acc ace ack acr acv aea aeb aec aee aek aer aev aka akb akc ake akk akr akv ar- ara arb arc are ark arr arv av- ava avb avc ave avk avr baa bab bac bae bak bar bav bba bbb bbc bbe bbk bbr bca bcb bcc bce bck bcr bcv be- bea beb bec bee bek ber bev bka bkb bkc bke bkk bkr bkv bra brb bre brk brr brv bva bvb bvc bve bvk bvr bvv c-- caa cab cac cae cak car cav cba cbb cbc cbe cbk cbr cbv cca ccb ccc cce cck ccr ccv ce- cea ceb cec cee cek cer cev cka ckb ckc cra crb crc cre crk crr crv cva cvb cvc cve cvk cvr cvv eaa eab eac eae eak ear eav eba ebb ebc ebe ebk ebr ebv ec- eca ecb ecc ece eck ecr ecv eea eeb eec eee eek eer eev eka ekb ekc eke ekr ekv era erb erc ere erk err erv eva evb evc eve evr evv ka- kaa kab kac kae kak kar kav kba kbb kbc kbe kbk kbr kca kcb kcc kce kck kcr ke- kea keb kec kee kek ker kev kkb kkc kke kkk kkr kkv kra krc krk krr krv kva kvb kvk kvr kvv ra- raa rab rac rae rak rar rav rba rbb rbc rbe rbk rbr rca rcb rcc rce rcr rcv re- rea reb rec ree rek rer rev rkb rkc rke rkk rkv rra rrb rrc rrk rrr rva rvb rvc rve rvr rvv v-a v-e vaa vab vac vae vak var vav vba vbc vbk vbr vbv vca vcc vce vcr vea veb vec vee vek ver vka vkb vra vrb vrc vre vrk vrr vva vvb vvc vvr vvv

-vac a-ak a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aaca aacb aacc aace aack aacr aacv aaea aaec aaev aaka aake aara aarc aare aava abaa abab abac abae abak abar abb- abba abbb abbe abbr abca abcb abcc abcr abec abee aber abra abrc abva acaa acab acac acae acar acba acca accc acce ace- acea acec acek acer acev acke acr- acra acrc acre acrr acrv acvv aeac aecb aeer aeka aer- aera aerc aeva akaa akae akar akca akee aker akka akr- akra akre arab arac arae arak arar arba arbe arc- arca arce area arec aree arek arev arka arke arr- arra arrc arre arrk arrr arva arve avab avar avcc avce avea avec aver avra avre avva baaa baak baar baba babb babe babr bac- baca bacc bace back baek baer bak- baka bake bakr bar- bara barb barc bare bark barr bava bave bbbb bbeb bbrc bcaa bcar bcbc bcca bccc bcec bcer bcra beak bear beav beba bebb bebe beca beck beeb beek beer beka beke bera berc bere berk berr brab brac brae brak brav brca brcb brce brea breb brec bree brek brer brev brka brkb brrr caaa caab caac caba cabe cac- caca cacc cace cack cacr caec caer caka cake cara carb carc care cark carr cava cave cbac cbar cbbc cbca cbcc cbce cbcr cbea cbec cbee cber cbka cbkr cbre cbva cbvb cbve cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccv ccee ccra ccrc ccre ceac cear ceba cec- ceca cece ceeb ceec ceke cer- cera cerc cere ceva ckac ckbc ckbe ckck ckcv cker ckrc crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree crkc cvac cvar cvca cvcc cver cvra cvrr eaba eaca eacc eaec eara earb eare eave ebac ebba ebbc ebbr ebcc eber ecaa ecac ecar ecbc ecbe ecca eccb eccc ecce ecka ecra ecrc ecrr ecrv eeca eeea eeee eeka eeke eera eerc eeva eka- ekab ekeb ekek eker ekka erba erbb erbe erca ercc erce ereb erec erer erev erke erra errc erre erve evac evae evar evea ever evra evre evvk kaaa kaab kaak kaar kaba kabb kabc kabe kabr kacb kacc kace kacv kaer kaka kakc kake kakk kara karb kare kark karr karv kava kavb kave kavv kbaa kbab kbac kbae kbak kbar kbba kbbb kbbc kbbe kbbk kbbr kbca kbcb kbce kbck kbcr kbeb kbec kbee kbek kber kbev kbkb kbkk kbkr kbkv kbra kbrb kbrc kbre kbrk kbrv kbva kbvb kbvc kbvr kcaa kcab kcac kcar kcav kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kccv kcea kceb kcec kcee kckc kckk kckr kckv kcrc kcrr kcrv kcvk kcvr kcvv kea- keak kear keba kebb kebc kebe kebr keca keck kecr keek keer keka kekb kekc keke ker- kera kerb kerc kere kerk kerr kerv keva keve kkaa kkac kkar kkba kkbb kkbe kkbr kkcb kkck kkcr kkea kkkk kkrb kkrc kkre kkrk kkrr kkrv kkvr kkvv krab krac krae krak krar krav krba krbb krbe krbk krbr krca krcb krcc krce krea kreb krec kree krek krev krka krkc krke krkk krkr krkv krrb krrc krre krrk krrr krva krvb krvc krve krvk krvr krvv kvab kvak kvar kvbc kvbr kvcb kvcc kvce kvck kvcr kvcv kvea kvec kver kvra kvrc kvre kvrr kvrv kvvr kvvv raab raak raba rabb rabe rabk rac- raca racc race rack racv raec raer raka rake rakk rara rarb rare rark rava rave rbbb rbbr rcac rcbc rccb rccc rcvr rea- reac reae reak rear reba rebb rebe rebk reca recc rece reck recr reeb reek reev reka reke rera rere reva reve rrrr rv-c rvca rver vaar vaca vace vack vaka vake vara vare vark varr vava vbcc veak vear veba vecc veck veer veka veke ver- vera verb vere verk veve vrac vrak vrav vrba vver vvvv

-aaa- aaace aaaee aaarc aabaa aabba aabra aacbc aaker aakre abaab ababa ababe abaca aback abaer abaka abake abara abare abava abave abbac abbar abccc