-al -er a-a a-b a-c aaa aab aac aae aag aak aal aar ab- aba abb abc abe abg abk abl abr ac- aca acb acc ace acg ack acl acr aea aeb aec aee aeg aek ael aer ag- aga agb agc age agg agk agl agr aka akb akc ake akg akk akl akr al- ala alb alc ale alg alk all alr ar- ara arb arc are arg ark arl arr baa bab bac bae bag bak bal bar bba bbb bbc bbe bbg bbk bbl bbr bca bcb bcc bce bcg bck bcl bcr be- bea beb bec bee beg bek bel ber bga bgb bgc bge bgg bgk bgl bgr bka bkb bkc bke bkg bkk bkl bkr bla blb blc ble blg blk bll blr bra brb bre brg brk brl brr c-- caa cab cac cae cag cak cal car cba cbb cbc cbe cbg cbk cbl cbr cca ccb ccc cce ccg cck ccl ccr ce- cea ceb cec cee ceg cek cel cer cga cgb cgc cge cgg cgl cgr cka ckb ckc cl- cla clb clc cle clg clk cll clr cra crb crc cre crg crk crl crr eaa eab eac eae eag eak eal ear eba ebb ebc ebe ebg ebk ebl ebr ec- eca ecb ecc ece ecg eck ecl ecr eea eeb eec eee eeg eek eel eer ega egb egc ege egg egl egr eka ekb ekc eke ekg ekl ekr ela elb elc ele elg elk ell elr era erb erc ere erg erk erl err gaa gab gac gae gag gak gal gar gba gbc gbe gbg gbk gbl gbr gca gcb gcc gce gcg gck gcl gcr ge- gea geb gec gee geg gek gel ger gga ggb ggc ggg ggr gka gkb gla glb glc gle glg glk gll glr gra grb grc gre grg grk grl grr ka- kaa kab kac kae kag kak kal kar kba kbb kbc kbe kbk kbl kbr kca kcb kcc kce kcg kck kcl kcr ke- kea keb kec kee keg kek kel ker kga kgb kgc kgl kkb kkc kke kkk kkl kkr kl- kla klb klc klg klr kra krc krg krk krl krr la- laa lab lac lae lag lak lal lar lba lbb lbc lbe lbg lbk lbl lbr lca lcb lcc lce lcg lck lcl lcr lea leb lec lee leg lek lel ler lga lgb lgc lge lgg lgk lgl lgr lka lkb lkg lkl lkr lla llb llc lle llg llk lll llr lra lrb lrc lrg lrk lrr ra- raa rab rac rae rag rak ral rar rba rbb rbc rbe rbg rbk rbl rbr rca rcb rcc rce rcg rcl rcr re- rea reb rec ree reg rek rel rer rga rgb rgc rge rgg rgk rgr rkb rkc rke rkg rkk rla rlc rle rlg rll rlr rra rrb rrc rrg 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 aage aaka aake aala aalc aale aall aara aarc aare abaa abab abac abae abag abak abal abar abb- abba abbb abbe abbr abca abcb abcc abcl abcr abec abee abel aber abgl abla able abra abrc acaa acab acac acae acag acar acba acbl acca accc acce ace- acea acec acek acel acer acga acgr acke acla aclc acle aclr acr- acra acrc acre acrr aeac aecb aecl aeer aega aeka aela aelc aer- aera aerc agac agag agal agar agba agca agcc agce agea agee agel ager agga agge agla aglc agle agra agre agrl akaa akae akal akar akca akee akeg akel aker akka akle akr- akra akre alaa alac alae alag alak alal alar alb- alba albc albe alca alcc alce alea alec alee aleg alek aler alg- alga alge alk- alka alkb alke all- alla alle alll allr arab arac arae arag arak aral arar arba arbe arc- arca arce area arec aree areg arek arel arga argb arge arka arke arla arle arr- arra arrc arre arrg arrk arrr baaa baak baal baar baba babb babe babr bac- baca bacc bace back baek bael baer baga bage bagg bak- baka bake bakl bakr bala balc bale balk ball bar- bara barb barc bare barg bark barr bbbb bbeb bbga bblb bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bccl bcec bcer bcra beag beak beal bear beba bebb bebe beca beck beeb beeg beek beel beer bega begg beka beke bela bele belg belk bell bera berc bere berg berk berr bgca blaa blab blac blae blag blak blea bleb blee bleg blek blkb blrc blrg brab brac brae brag brak brca brcb brce brea breb brec bree breg brek brel brer brka brkb brrr caaa caab caac caal caba cabe cabg cac- caca cacc cace cack cacr caec caer caga cage cagg cagr 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 cbga cbgb cbka cbkg cbkl cbkr cblb cblc cbre cbrl ccaa ccab ccac ccag ccar ccba ccbc ccca cccb cccc cccl ccee ccel ccga ccgc ccla cclc cclg ccra ccrc ccre ccrg ccrl ceac ceal cear ceba cec- ceca cece ceeb ceec ceel cege ceke cel- cela celc cele cell cer- cera cerc cere cerl cgac cgal cgcc cgcg cgel cger ckac ckbc ckbe ckck ckcl cker ckga ckgl cklg ckrc clab clag clar clea clec clee cleg clek cler clkg clra crab crac crag crar crbc crca crcc crce crcr cre- crea creb crec cree creg crkc crkl e-cl e-la eaba eaca eacc eaec eaga eage eagl 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 eega eeka eeke eele eera eerc eerg egaa