a-a a-b a-c aaa aab aac aak aam aan aar ab- aba abb abc abk abm abn abr ac- aca acb acc ack acm acn acr aka akb akc akk akm akn akr ama amb amc amk amm amn amr an- ana anb anc ank anm ann anr ar- ara arb arc ark arm arn arr baa bab bac bak bam ban bar bba bbb bbc bbk bbm bbn bbr bca bcb bcc bck bcm bcn bcr bka bkb bkc bkk bkm bkn bkr bma bmb bmc bmk bmm bmn bmr bna bnb bnc bnk bnn bnr bra brb brk brm brn brr c-- caa cab cac cak cam can car cba cbb cbc cbk cbm cbn cbr cca ccb ccc cck ccm ccn ccr cka ckb ckc ckm cma cmb cmc cmk cmm cmn cmr cn- cna cnb cnc cnm cnn cnr cra crb crc crk crm crn crr ka- kaa kab kac kak kam kan kar kba kbb kbc kbk kbm kbn kbr kca kcb kcc kck kcm kcn kcr kkb kkc kkk kkm kkn kkr kma kmb kmc kmk kmm kn- kna knc knk knm knn knr kra krc krk krn krr m-r maa mab mac mak mam man mar mba mbb mbc mbk mbm mbr mc- mca mcb mcc mck mcm mcn mcr mka mkb mkc mkk mkm mkn mkr mma mmb mmc mmk mmm mmn mmr mna mnb mnc mnk mnm mnn mnr mra mrb mrc mrk mrm mrn mrr naa nab nac nak nam nan nar nba nbb nbc nbk nbm nbn nbr nca ncb ncc nck ncm ncn ncr nka nkc nkk nkm nkn nkr nma nmb nmc nmk nmm nmn nmr nna nnb nnc nnk nnm nnn nra nrb nrc nrk nrm nrn nrr ra- raa rab rac rak ram ran rar rba rbb rbc rbk rbm rbn rbr rca rcb rcc rcm rcn rcr rkb rkc rkk rkm rma rmb rmc rmm rmn rmr rna rnb rnc rnm rnn rnr rra rrb rrc rrk rrm rrn rrr

-ana a-ak aaaa aaab aaac aaam aaan aaar aaba aabb aabc aabm aaca aacb aacc aack aacm aacn aacr aaka aama aamb aamc aamn aamr aana aara aarc aarm abaa abab abac abak abam aban abar abb- abba abbb abbr abca abcb abcc abcn abcr abma abmb abmc abra abrc acaa acab acac acan acar acba acca accc accm acma acmc acr- acra acrc acrm acrr akaa akam akan akar akca akka akna akr- akra amaa amac amam aman amar amb- amba ambn ambr amca amcc amka amm- amma amra amrc ana- anaa anab anac anak anam anan anar anba anbb anca ancc ank- anka anma anna annb anrc arab arac arak aram aran arar arba arc- arca arcm arka arma armc armm arna arnk arr- arra arrc arrk arrr baaa baak baam baan baar baba babb babm babr bac- baca bacc back bacn bak- baka bakr bama bamb bamc bamm bamn bana banc bank bann banr bar- bara barb barc bark barm barn barr bbbb bbcm bbrc bcaa bcam bcar bcbc bcca bccc bccm bcma bcra bmaa bman bnrr brab brac brak bram bran brca brcb brka brkb brmc brna brrm brrr caaa caab caac caam caan caba cac- caca cacc cack cacm cacr caka cama camb camc camk camm cana canc cank cann cara carb carc cark carm carn carr cbac cbar cbbc cbca cbcc cbcm cbcn cbcr cbka cbkm cbkn cbkr cbna cbrm cbrn ccaa ccab ccac ccam ccar ccba ccbc ccbn ccca cccb cccc cccm cckm ccma ccmb ccmc ccmm ccna ccnb ccnc ccnm ccnr ccra ccrc ckac ckan ckbc ckck ckcm cknb cknc ckrc ckrm cmaa cmac cmba cmbc cmcc cmmb cmmc cmmn cmra cmrn cmrr cnaa cnac cnam cnbc cnbm cnma cnna cnrc cnrr crab crac cram cran crar crbc crca crcc crcr crkc crmb crmn crna kaaa kaab kaak kaam kaan kaar kaba kabb kabc kabr kacb kacc kaka kakc kakk kakm kakn kam- kama kamb kamc kamm kamn kamr kana kanb kanm kann kara karb kark karm karn karr kbaa kbab kbac kbak kbam kbar kbba kbbb kbbc kbbk kbbm kbbr kbca kbcb kbck kbcr kbkb kbkk kbkr kbmb kbmc kbmr kbna kbnn kbnr kbra kbrb kbrc kbrk kbrn kcaa kcab kcac kcam kcar kcba kcbc kcbk kcbr kcca kccb kccc kcck kccr kckc kckk kckm kckn kckr kcmb kcmc kcmk kcmm kcmn kcmr kcnb kcnm kcnr kcrc kcrn kcrr kkaa kkac kkam kkan kkar kkba kkbb kkbn kkbr kkcb kkck kkcm kkcn kkcr kkkk kkma kkmc kkmk kkmr kknb kknm kknn kkrb kkrc kkrk kkrn kkrr kmac kmak kmam kman kmbc kmbr kmca kmcb kmcc kmcm kmcn kmcr kmkk kmmk kmmm kmmr kmna kmnb kmnr kmrb kmrc kmrn kmrr knaa knab knac knam knan knar knba knbb knbc knbn knbr knca kncb knck kncm kncn kncr knkk knmb knmc knnb knnk knnr knrb knrk krab krac krak kram kran krar krba krbb krbk krbm krbr krca krcb krcc krcm krcn krka krkc krkk krkn krkr krma krmb krmc krmn krmr krna krnb krnk krnm krnn krrb krrc krrk krrm krrn krrr maaa maac maak maam maan maar maba mac- maca macb macc mack macr maka mama mamc man- mana manc mank mann mar- mara marc mark marm marr mbac mbam mbba mbca mbna mcaa mcac mcan mcba mcbc mcca mccc mckk mcmc mcrc mkak mknk mmaa mmab mmac mman mmar mmcc mmcm mmmc mmmm mmrc mnaa mnac mnam mnba mnbb mnra mr-c mrac mrbb mrbm mrca mrcb mrcc mrkr mrmc mrna mrnc mrrc naaa naab naac naam naan naar naba nabc nabk naca nacc nack nacm naka nama namb namm nan- nana nanb nann nara narc nark narm narn narr nbaa nbak nbar nbbc nbca nbcc ncaa ncac ncar ncba ncbc ncca nccc nccn nccr ncmm ncna ncnc ncra ncrc nkam nman nmmc nmra nmrc nnmc nnnn nrab nram nrca nrma nrna nrrc raab raak raam raan raba rabb rabk rac- raca racc rack raka rakk rama ramb ramm rana ranc rank rann rara rarb