-er a-a a-b a-c aaa aab aac aae aak aam aar ab- aba abb abc abe abk abm abr ac- aca acb acc ace ack acm acr aea aeb aec aee aek aem aer aka akb akc ake akk akm akr ama amb amc ame amk amm amr ar- ara arb arc are ark arm arr baa bab bac bae bak bam bar bba bbb bbc bbe bbk bbm bbr bca bcb bcc bce bck bcm bcr be- bea beb bec bee bek bem ber bka bkb bkc bke bkk bkm bkr bma bmb bmc bme bmk bmm bmr bra brb bre brk brm brr c-- caa cab cac cae cak cam car cba cbb cbc cbe cbk cbm cbr cca ccb ccc cce cck ccm ccr ce- cea ceb cec cee cek cem cer cka ckb ckc ckm cma cmb cmc cme cmk cmm cmr cra crb crc cre crk crm crr eaa eab eac eae eak eam ear eba ebb ebc ebe ebk ebm ebr ec- eca ecb ecc ece eck ecm ecr eea eeb eec eee eek eem eer eka ekb ekc eke ekr em- ema emb emc eme emk emm emr era erb erc ere erk erm err ka- kaa kab kac kae kak kam kar kba kbb kbc kbe kbk kbm kbr kca kcb kcc kce kck kcm kcr ke- kea keb kec kee kek kem ker kkb kkc kke kkk kkm kkr kma kmb kmc kme kmk kmm kra krc krk krr m-r maa mab mac mae mak mam mar mba mbb mbc mbe mbk mbm mbr mc- mca mcb mcc mce mck mcm mcr mea meb mec mee mek mem mer mka mkb mkc mke mkk mkm mkr mma mmb mmc mme mmk mmm mmr mra mrb mrc mre mrk mrm mrr ra- raa rab rac rae rak ram rar rba rbb rbc rbe rbk rbm rbr rca rcb rcc rce rcm rcr re- rea reb rec ree rek rem rer rkb rkc rke rkk rkm rma rmb rmc rme rmm rmr rra rrb rrc rrk rrm rrr

a-ak a-be aaaa aaab aaac aaae aaam aaar aaba aabb aabc aabm aaca aacb aacc aace aack aacm aacr aaea aaec aaem aaka aake aama aamb aamc aame aamr aara aarc aare aarm abaa abab abac abae abak abam abar abb- abba abbb abbe abbr abca abcb abcc abcr abec abee aber abma abmb abmc abra abrc acaa acab acac acae acar acba acca accc acce accm ace- acea acec acek acem acer acke acma acmc acme acr- acra acrc acre acrm acrr aeac aecb aeer aeka aer- aera aerc akaa akae akam akar akca akee aker akka akr- akra akre amaa amac amae amam amar amb- amba ambe ambr amca amcc amec amee amer amka amm- amma amme amra amrc arab arac arae arak aram arar arba arbe arc- arca arce arcm area arec aree arek arem arka arke arma armc arme armm arr- arra arrc arre arrk arrr baaa baak baam baar baba babb babe babm babr bac- baca bacc bace back baek baer bak- baka bake bakr bama bamb bamc bame bamm bar- bara barb barc bare bark barm barr bbbb bbcm bbeb bbrc bcaa bcam bcar bcbc bcca bccc bccm bcec bcer bcma bcra beak beam bear beba bebb bebe beca beck beeb beek beem beer beka beke bema beme bera berc bere berk berm berr bmaa bmce brab brac brae brak bram brca brcb brce brea breb brec bree brek brem brer brka brkb brmc brrm brrr caaa caab caac caam caba cabe cac- caca cacc cace cack cacm cacr caec caem caer caka cake cama camb camc came camk camm cara carb carc care cark carm carr cbac cbar cbbc cbca cbcc cbce cbcm cbcr cbea cbec cbee cber cbka cbkm cbkr cbme cbre cbrm ccaa ccab ccac ccam ccar ccba ccbc ccca cccb cccc cccm ccee cckm ccma ccmb ccmc ccmm ccra ccrc ccre ceac cear ceba cec- ceca cece cecm ceeb ceec ceem ceke cema cemb ceme cemm cemr cer- cera cerc cere ckac ckbc ckbe ckck ckcm ckem cker ckrc ckrm cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc cmra cmrr crab crac cram crar crbc crca crcc crce crcr cre- crea creb crec cree crem crkc crmb eaba eaca eacc eaec eama eame eara earb eare ebac ebam ebba ebbc ebbr ebcc eber ecaa ecac ecam ecar ecbc ecbe ecca eccb eccc ecce eccm ecem ecka ecma ecra ecrc ecrm ecrr eeca eeea eeee eeka eeke eera eerc eka- ekab ekam ekeb ekek eker ekka ekma emac emae emam emar emba embe embr emcc emek emer emma emme emra emre eram erba erbb erbe erca ercc erce ereb erec erem erer erke erma ermc erme erra errc erre kaaa kaab kaak kaam kaar kaba kabb kabc kabe kabr kacb kacc kace kaer kaka kakc kake kakk kakm kam- kama kamb kamc kame kamm kamr kara karb kare kark karm karr kbaa kbab kbac kbae kbak kbam kbar kbba kbbb kbbc kbbe kbbk kbbm kbbr kbca kbcb kbce kbck kbcr kbeb kbec kbee kbek kber kbkb kbkk kbkr kbmb kbmc kbme kbmr kbra kbrb kbrc kbre kbrk kcaa kcab kcac kcam kcar kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kcea kceb kcec kcee kckc kckk kckm kckr kcmb kcmc kcme kcmk kcmm kcmr kcrc kcrr kea- keak keam kear keba kebb kebc kebe kebr keca keck kecr keek keem keer keka kekb kekc keke kema kemb kemc keme kemm kemr ker- kera kerb kerc kere kerk kerm kerr kkaa kkac kkam kkar kkba kkbb kkbe kkbr kkcb kkck kkcm kkcr kkea kkkk kkma kkmc kkmk kkmr kkrb kkrc kkre kkrk kkrr kmac kmae kmak kmam kmbc kmbr kmca kmcb kmcc kmce kmcm kmcr kmea kmem kmer kmke kmkk kmme kmmk kmmm kmmr kmrb kmrc kmrr krab krac krae krak kram krar krba krbb krbe krbk krbm krbr krca krcb krcc krce krcm krea kreb krec kree krek krem krka krkc krke krkk krkr