-al -er a-a a-b a-c aaa aab aac aae aak aal aar ab- aba abb abc abe abk abl abr ac- aca acb acc ace ack acl acr aea aeb aec aee aek ael aer aka akb akc ake akk akl akr al- ala alb alc ale alk all alr ar- ara arb arc are ark arl arr baa bab bac bae bak bal bar bba bbb bbc bbe bbk bbl bbr bca bcb bcc bce bck bcl bcr be- bea beb bec bee bek bel ber bka bkb bkc bke bkk bkl bkr bla blb blc ble blk bll blr bra brb bre brk brl brr c-- caa cab cac cae cak cal car cba cbb cbc cbe cbk cbl cbr cca ccb ccc cce cck ccl ccr ce- cea ceb cec cee cek cel cer cka ckb ckc cl- cla clb clc cle clk cll clr cra crb crc cre crk crl crr eaa eab eac eae eak eal ear eba ebb ebc ebe ebk ebl ebr ec- eca ecb ecc ece eck ecl ecr eea eeb eec eee eek eel eer eka ekb ekc eke ekl ekr ela elb elc ele elk ell elr era erb erc ere erk erl err ka- kaa kab kac kae kak kal kar kba kbb kbc kbe kbk kbl kbr kca kcb kcc kce kck kcl kcr ke- kea keb kec kee kek kel ker kkb kkc kke kkk kkl kkr kl- kla klb klc klr kra krc krk krl krr la- laa lab lac lae lak lal lar lba lbb lbc lbe lbk lbl lbr lca lcb lcc lce lck lcl lcr lea leb lec lee lek lel ler lka lkb lkl lkr lla llb llc lle llk lll llr lra lrb lrc lrk lrr ra- raa rab rac rae rak ral rar rba rbb rbc rbe rbk rbl rbr rca rcb rcc rce rcl rcr re- rea reb rec ree rek rel rer rkb rkc rke rkk rla rlc rle rll rlr rra rrb rrc rrk rrl rrr

a-ak a-be aaaa aaab aaac aaae aaal aaar aaba aabb aabc aabl aaca aacb aacc aace aack aacl aacr aaea aaec aaka aake aala aalc aale aall aara aarc aare abaa abab abac abae abak abal abar abb- abba abbb abbe abbr abca abcb abcc abcl abcr abec abee abel aber abla able abra abrc acaa acab acac acae acar acba acbl acca accc acce ace- acea acec acek acel acer acke acla aclc acle aclr acr- acra acrc acre acrr aeac aecb aecl aeer aeka aela aelc aer- aera aerc 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 alk- alka alkb alke all- alla alle alll allr arab arac arae arak aral arar arba arbe arc- arca arce area arec aree arek arel arka arke arla arle arr- arra arrc arre arrk arrr 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 bbbb bbeb bblb bbrc bcaa bcar bcbc bcca bccc bccl bcec bcer bcra beak beal bear 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 brca brcb brce brea breb brec bree brek brel brer 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 cbac cbal cbar cbbc cbca cbcc cbce cbcl cbcr cbea cbec cbee cber cbka cbkl cbkr cblb cblc cbre cbrl ccaa ccab ccac ccar ccba ccbc ccca cccb cccc cccl ccee ccel ccla cclc 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 ckac ckbc ckbe ckck ckcl cker ckrc clab clar clea clec clee clek cler clra crab crac crar crbc crca crcc crce crcr cre- crea creb crec cree crkc crkl e-cl e-la eaba eaca eacc eaec eala ealc eale eara earb eare earl 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 eeca eeea eeee eeka eeke eele eera eerc eka- ekab ekeb ekek eker ekka el-b elab elac elal elar elba elbe elca elcb elce elea elec elee elek eler elka elke ella elle elra eral erba erbb erbe erca ercc erce ereb erec erel erer erke erla erle erll erra errc erre kaaa kaab kaak kaal kaar kaba kabb kabc kabe kabr kacb kacc kace kacl kael kaer kaka kakc kake kakk kala kalb kalc kale kalk kall kara karb kare kark karl karr kbaa kbab kbac kbae kbak kbal kbar kbba kbbb kbbc kbbe kbbk kbbl kbbr kbca kbcb kbce kbck kbcl kbcr kbeb kbec kbee kbek kbel kber kbkb kbkk kbkl kbkr kbla kblb kble kbll kblr kbra kbrb kbrc kbre kbrk kbrl kcaa kcab kcac kcal kcar kcba kcbc kcbk kcbl kcbr kcca kccb kccc kcck kccl kccr kcea kceb kcec kcee kcel kckc kckk kckl kckr kcla kclc kcle kclk kcll kclr kcrc kcrr kea- keak keal kear keba kebb kebc kebe kebr keca keck kecr keek keel keer keka kekb kekc keke kekl kela kele kelk kell ker- kera kerb kerc kere kerk kerl kerr kkaa kkac kkal kkar kkba kkbb kkbe kkbl kkbr kkcb kkck kkcl kkcr kkea kkkk kklb kklc kkll kkrb kkrc kkre kkrk kkrl kkrr klaa klab klac klak klal klar klbb klbc klbe klbl klca klcb klcc klce klck klcl klcr klea kleb klec klee klek kler klka klkc klkk klkl klkr klla kllb kllc klle kllk klrc klrk klrr krab