-al a-a a-b a-c aaa aab aac aae aaf aak aal aam ab- aba abb abc abe abf abk abl abm ac- aca acb acc ace acf ack acl acm aea aeb aec aee aef aek ael aem af- afa afb afc afe aff afk afl afm aka akb akc ake akk akl akm al- ala alb alc ale alf alk all alm ama amb amc ame amf amk aml amm baa bab bac bae baf bak bal bam bba bbb bbc bbe bbf bbk bbl bbm bca bcb bcc bce bcf bck bcl bcm be- bea beb bec bee bef bek bel bem bfa bfb bfc bfe bff bfl bfm bka bkb bkc bke bkf bkk bkl bkm bla blb blc ble blf blk bll blm bma bmb bmc bme bmf bmk bml bmm c-- caa cab cac cae caf cak cal cam cba cbb cbc cbe cbf cbk cbl cbm cca ccb ccc cce ccf cck ccl ccm ce- cea ceb cec cee cef cek cel cem cfa cfb cfc cfe cff cfk cfl cfm cka ckb ckc ckm cl- cla clb clc cle clf clk cll clm cma cmb cmc cme cmf cmk cml cmm eaa eab eac eae eaf eak eal eam eba ebb ebc ebe ebf ebk ebl ebm ec- eca ecb ecc ece ecf eck ecl ecm eea eeb eec eee eef eek eel eem ef- efa efb efc efe eff efl efm eka ekb ekc eke ekf ekl ela elb elc ele elf elk ell elm em- ema emb emc eme emf emk eml emm faa fab fac fae faf fak fal fam fba fbb fbc fbe fbf fbk fbl fbm fca fcb fcc fce fcf fck fcl fcm fea feb fec fee fef fek fel fem ffa ffc ffe fff ffk ffl ffm fka fkb fkc fkf fkk fkl fkm fla flb flc fle flf fll flm fma fmb fmc fme fmf fml fmm ka- kaa kab kac kae kaf kak kal kam kba kbb kbc kbe kbf kbk kbl kbm kca kcb kcc kce kck kcl kcm ke- kea keb kec kee kef kek kel kem kfa kfc kff kfm kkb kkc kke kkk kkl kkm kl- kla klb klc klf klm kma kmb kmc kme kmf kmk kml kmm la- laa lab lac lae laf lak lal lam lba lbb lbc lbe lbf lbk lbl lbm lca lcb lcc lce lcf lck lcl lcm lea leb lec lee lef lek lel lem lfa lfb lfc lfe lff lfk lfl lfm lka lkb lkl lla llb llc lle llf llk lll llm lma lmb lmc lme lmf lmk lml lmm m-f maa mab mac mae maf mak mal mam mba mbb mbc mbe mbf mbk mbl mbm mc- mca mcb mcc mce mcf mck mcl mcm mea meb mec mee mef mek mel mem mfa mfb mfc mfe mff mfl mfm mka mkb mkc mke mkk mkl mkm mla mlb mlc mle mlf mlk mll mlm mma mmb mmc mme mmf mmk mml mmm

a-ak a-be aaaa aaab aaac aaae aaaf aaal aaam aaba aabb aabc aabl aabm aaca aacb aacc aace aacf aack aacl aacm aaea aaec aaem aafa aafb aafc aaff aafl aaka aake aala aalc aale aall aama aamb aamc aame abaa abab abac abae abaf abak abal abam abb- abba abbb abbe abca abcb abcc abcf abcl abec abee abel abff abla able abma abmb abmc acaa acab acac acae acba acbl acca accc acce accf accm ace- acea acec acek acel acem acfc acfe acfl acfm acke acla aclc acle acma acmc acme acmf aeac aeaf aecb aecl aeka aela aelc afaa afak afam afca afcb afcc afee afek afel affa affc afka afla aflc afle afma afmc akaa akae akal akam akca akee akel akka akle alaa alac alae alak alal alam alb- alba albc albe albm alca alcc alce alea alec alee alef alek alem alfa alfe alk- alka alkb alke all- alla alle alll alma almc alme amaa amac amae amal amam amb- amba ambe amca amcc amec amee amel amfm amka amla amm- amma amme baaa baaf baak baal baam baba babb babe babm bac- baca bacc bace back baek bael bafc baff bak- baka bake bakl bala balc bale balf balk ball balm bama bamb bamc bame bamf baml bamm bbbb bbcm bbeb bbfc bblb bcaa bcam bcbc bcca bccc bccl bccm bcec bcfc bcfm bcma beaf beak beal beam beba bebb bebe beca beck beeb beef beek beel beem befa befe beff beka beke bela bele belk bell belm bema beme bfca bffl bfme blaa blab blac blae blak blam blea bleb blee blek blem blfc blkb blme bmaa bmce bmfc caaa caab caac caaf caal caam caba cabe cabf cac- caca cacc cace cack cacm caec caem cafa cafb cafc cafe caff cafl caka cake cala calc cale calf calk call calm cama camb camc came camk caml camm cbac cbal cbbc cbca cbcc cbce cbcl cbcm cbea cbec cbee cbef cbfb cbfc cbka cbkl cbkm cblb cblc cbme ccaa ccab ccac ccaf ccam ccba ccbc ccca cccb cccc cccf cccl cccm ccee ccel ccfa ccfc ccff ccfl cckm ccla cclc cclm ccma ccmb ccmc ccmm ceac ceal ceba cec- ceca cece cecm ceeb ceec ceel ceem cef- cefa cefc ceke cel- cela celc cele celf cell cema cemb ceme cemm cfaa cfab cfac cfae cfam cfbc cfca cfcb cfcf cfcl cfcm cffb cfma cfmb cfml ckac ckbc ckbe ckck ckcl ckcm ckem cklf cklm ckml clab claf clam clea clec clee clef clek clem cmaa cmac cmba cmbc cmcc cmea cmec cmfb cmla cmll cmmb cmmc cmml e-cl e-la eaaf eaba eaca eacc eaec eafb eala ealc eale eama eame ebac ebal ebam ebba ebbc ebcc ebel ebfc ebla ecaa ecac ecal ecam ecbc ecbe ecca eccb eccc ecce eccl eccm ecef ecem ecfa ecfc ecka ecla ecma eeca eeea eeee eefa eefe eefl eeka eeke eele efab efca effa efke efla efma eka- ekab ekam ekeb ekek