-al a-a a-b a-c aaa aab aac aae aaf aak aal aas ab- aba abb abc abe abf abk abl abs ac- aca acb acc ace acf ack acl acs aea aeb aec aee aef aek ael aes af- afa afb afc afe aff afk afl afs aka akb akc ake akk akl aks al- ala alb alc ale alf alk all als as- asa asb asc ase asf ask asl ass baa bab bac bae baf bak bal bas bba bbb bbc bbe bbf bbk bbl bbs bca bcb bcc bce bcf bck bcl bcs be- bea beb bec bee bef bek bel bes bfa bfb bfc bfe bff bfl bfs bka bkb bkc bke bkf bkk bkl bks bla blb blc ble blf blk bll bls bsa bsb bsc bse bsf bsk bsl bss c-- caa cab cac cae caf cak cal cas cba cbb cbc cbe cbf cbk cbl cbs cca ccb ccc cce ccf cck ccl ccs ce- cea ceb cec cee cef cek cel ces cfa cfb cfc cfe cff cfk cfl cfs cka ckb ckc cks cl- cla clb clc cle clf clk cll cls csa csb csc cse csf csk csl css eaa eab eac eae eaf eak eal eas eba ebb ebc ebe ebf ebk ebl ebs ec- eca ecb ecc ece ecf eck ecl ecs eea eeb eec eee eef eek eel ees ef- efa efb efc efe eff efl efs eka ekb ekc eke ekf ekl eks ela elb elc ele elf elk ell els es- esa esb esc ese esf esk esl ess faa fab fac fae faf fak fal fas fba fbb fbc fbe fbf fbk fbl fbs fca fcb fcc fce fcf fck fcl fcs fea feb fec fee fef fek fel fes ffa ffc ffe fff ffk ffl ffs fka fkb fkc fkf fkk fkl fla flb flc fle flf fll fls fsa fsb fsc fse fsf fsk fsl fss ka- kaa kab kac kae kaf kak kal kas kba kbb kbc kbe kbf kbk kbl kbs kca kcb kcc kce kck kcl kcs ke- kea keb kec kee kef kek kel kes kfa kfc kff kfs kkb kkc kke kkk kkl kks kl- kla klb klc klf kls ksa ksb ksc kse ksf ksk ksl kss la- laa lab lac lae laf lak lal las lba lbb lbc lbe lbf lbk lbl lbs lca lcb lcc lce lcf lck lcl lcs lea leb lec lee lef lek lel les lfa lfb lfc lfe lff lfk lfl lfs lka lkb lkl lks lla llb llc lle llf llk lll lls lsa lsb lsc lse lsf lsk lsl lss saa sab sac sae saf sak sal sas sba sbb sbc sbe sbf sbk sbl sbs sca scb scc sce scf sck scl scs se- sea seb sec see sef sek sel ses sfa sfb sfc sfe sff sfk sfl sfs sk- ska skb skc ske skf skk skl sks sla slb slc sle slf slk sll sls ss- ssa ssb ssc sse ssf ssk ssl sss

-ase a-ak a-be aaaa aaab aaac aaae aaaf aaal aaas aaba aabb aabc aabl aaca aacb aacc aace aacf aack aacl aacs aaea aaec aaes aafa aafb aafc aaff aafl aaka aake aala aalc aale aall aals aasa aasc aase aasf aass abaa abab abac abae abaf abak abal abas abb- abba abbb abbe abbs abca abcb abcc abcf abcl abcs abec abee abel abes abff abla able abls abs- absa abse absf absl abss acaa acab acac acae acas acba acbl acca accc acce accf accs ace- acea acec acek acel aces acfc acfe acfl acfs acke acks acla aclc acle acls acsa acsc acse acsl acss aeac aeaf aeas aebs aecb aecl aeka aela aelc aesc aess afaa afak afbs afca afcb afcc afcs afee afek afel afes affa affc affs afka afla aflc afle afsa afsb afsc akaa akae akal akas akca akee akel akes akka akle aksa alaa alac alae alak alal alas alb- alba albc albe albs alca alcc alce alcs alea alec alee alef alek ales alfa alfe alfs alk- alka alkb alke all- alla alle alll alls alsa alsc alse asaa asab asac asae asaf asak asal asas asba asc- asca ascb ascc asce ascl asea asec asee asek asel ases asfa aska aske asks asla asle assa assc asse assk assl asss baaa baaf baak baal baas baba babb babe babs bac- baca bacc bace back bacs baek bael baes bafc baff bak- baka bake bakl baks bala balc bale balf balk ball bals basa basc base basf bask bass bbas bbbb bbbs bbeb bbfc bblb bbls bcaa bcas bcbc bcbs bcca bccc bccl bccs bcec bces bcfc bcsa bcsc bcsl bcss beaf beak beal beas beba bebb bebe beca beck becs beeb beef beek beel bees befa befe beff beka beke beks bela bele belk bell bels bes- besa bese besk bess bfas bfca bfcs bffl bffs blaa blab blac blae blak blas blea bleb blee blek bles blfc blkb blls blss bsaa bsac bsas bscs bsea bseb bsec bsee bses bsfa bsfc bsff bsfs bslc bssc bsse caaa caab caac caaf caal caas caba cabe cabf cabs cac- caca cacc cace cack caec caes cafa cafb cafc cafe caff cafl cafs caka cake cala calc cale calf calk call cals casa casb casc case cask casl cass cbac cbal cbbc cbbs cbca cbcc cbce cbcl cbcs cbea cbec cbee cbef cbfb cbfc cbka cbkl cblb cblc cbsa cbsc cbse ccaa ccab ccac ccaf ccas ccba ccbc ccca cccb cccc cccf cccl cccs ccee ccel ccfa ccfc ccff ccfl ccla cclc ccls ccsa ccsf ccsl ccss ceac ceal ceas ceba cebs cec- ceca cece cecs ceeb ceec ceel cees cef- cefa cefc ceke cel- cela celc cele celf cell cels cesa cesc cese cess cfaa cfab cfac cfae cfbc cfbs cfca cfcb cfcf cfcl cfcs cffb cfls cfsa cfse cfsl ckac ckbc ckbe ckck ckcl ckcs cklf cksa cksb cksl clab claf