-al -er a-a a-b a-c aaa aab aac aae aak aal aar aav ab- aba abb abc abe abk abl abr abv ac- aca acb acc ace ack acl acr acv aea aeb aec aee aek ael aer aev aka akb akc ake akk akl akr akv al- ala alb alc ale alk all alr alv ar- ara arb arc are ark arl arr arv av- ava avb avc ave avk avl avr baa bab bac bae bak bal bar bav bba bbb bbc bbe bbk bbl bbr bca bcb bcc bce bck bcl bcr bcv be- bea beb bec bee bek bel ber bev bka bkb bkc bke bkk bkl bkr bkv bla blb blc ble blk bll blr blv bra brb bre brk brl brr brv bva bvb bvc bve bvk bvl bvr bvv c-- caa cab cac cae cak cal car cav cba cbb cbc cbe cbk cbl cbr cbv cca ccb ccc cce cck ccl ccr ccv ce- cea ceb cec cee cek cel cer cev cka ckb ckc cl- cla clb clc cle clk cll clr clv cra crb crc cre crk crl crr crv cva cvb cvc cve cvk cvl cvr cvv eaa eab eac eae eak eal ear eav eba ebb ebc ebe ebk ebl ebr ebv ec- eca ecb ecc ece eck ecl ecr ecv eea eeb eec eee eek eel eer eev eka ekb ekc eke ekl ekr ekv ela elb elc ele elk ell elr elv era erb erc ere erk erl err erv eva evb evc eve evl evr evv ka- kaa kab kac kae kak kal kar kav kba kbb kbc kbe kbk kbl kbr kca kcb kcc kce kck kcl kcr ke- kea keb kec kee kek kel ker kev kkb kkc kke kkk kkl kkr kkv kl- kla klb klc klr klv kra krc krk krl krr krv kva kvb kvk kvr kvv la- laa lab lac lae lak lal lar lav lba lbb lbc lbe lbk lbl lbr lbv lca lcb lcc lce lck lcl lcr lcv lea leb lec lee lek lel ler lev lka lkb lkl lkr lla llb llc lle llk lll llr llv lra lrb lrc lrk lrr lrv lva lvb lvc lve lvl lvr lvv ra- raa rab rac rae rak ral rar rav rba rbb rbc rbe rbk rbl rbr rca rcb rcc rce rcl rcr rcv re- rea reb rec ree rek rel rer rev rkb rkc rke rkk rkv rla rlc rle rll rlr rra rrb rrc rrk rrl rrr rva rvb rvc rve rvl rvr rvv v-a v-e vaa vab vac vae vak val var vav vba vbc vbk vbl vbr vbv vca vcc vce vcl vcr vea veb vec vee vek vel ver vka vkb vl- vla vlb vlc vle vlk vll vlv vra vrb vrc vre vrk vrr vva vvb vvc vvr vvv

-vac a-ak a-be aaaa aaab aaac aaae aaal aaar aaav aaba aabb aabc aabl aaca aacb aacc aace aack aacl aacr aacv aaea aaec aaev aaka aake aala aalc aale aall aara aarc aare aava abaa abab abac abae abak abal abar abb- abba abbb abbe abbr abca abcb abcc abcl abcr abec abee abel aber abla able ablv abra abrc abva acaa acab acac acae acar acba acbl acca accc acce ace- acea acec acek acel acer acev acke acla aclc acle aclr acr- acra acrc acre acrr acrv acvv aeac aecb aecl aeer aeka aela aelc aer- aera aerc aeva akaa akae akal akar akca akee akel aker akka akle akr- akra akre alaa alac alae alak alal alar alb- alba albc albe alca alcc alce alea alec alee alek aler alev alk- alka alkb alke all- alla alle alll allr alva arab arac arae arak aral arar arba arbe arc- arca arce area arec aree arek arel arev arka arke arla arle arr- arra arrc arre arrk arrr arva arve avab aval avar avcc avce avea avec avel aver avlb avra avre avva baaa baak baal baar baba babb babe babr bac- baca bacc bace back baek bael baer bak- baka bake bakl bakr bala balc bale balk ball bar- bara barb barc bare bark barr bava bave bbbb bbeb bblb bbrc bcaa bcar bcbc bcca bccc bccl bcec bcer bcra beak beal bear beav beba bebb bebe beca beck beeb beek beel beer beka beke bela bele belk bell bera berc bere berk berr blaa blab blac blae blak blea bleb blee blek blkb blrc brab brac brae brak brav brca brcb brce brea breb brec bree brek brel brer brev brka brkb brrr caaa caab caac caal caba cabe cac- caca cacc cace cack cacr caec caer caka cake cala calc cale calk call cara carb carc care cark carl carr cava cave cbac cbal cbar cbbc cbca cbcc cbce cbcl cbcr cbea cbec cbee cber cbka cbkl cbkr cblb cblc cbre cbrl cbva cbvb cbve cbvr ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl cccv ccee ccel ccla cclc cclv ccra ccrc ccre ccrl ceac ceal cear ceba cec- ceca cece ceeb ceec ceel ceke cel- cela celc cele cell cer- cera cerc cere cerl ceva ckac ckbc ckbe ckck ckcl ckcv cker ckrc ckvl clab clar clav clea clec clee clek cler clra clrv crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree crkc crkl cvac cvar cvca cvcc cver cvra cvrr e-cl e-la eaba eaca eacc eaec eala ealc eale eara earb eare earl eave ebac ebal ebba ebbc ebbr ebcc ebel eber ebla ecaa ecac ecal ecar ecbc ecbe ecca eccb eccc ecce eccl ecka ecla ecra ecrc ecrl ecrr ecrv eeca eeea eeee eeka eeke eele eelv eera eerc eeva eka- ekab ekeb ekek eker ekka el-b elab elac elal elar elba elbe elca elcb elce elea elec elee elek eler elev elka elke ella elle elra elva elve eral erba erbb erbe erca ercc erce ereb erec erel erer erev erke erla erle erll