-ana aaaa aaab aaac aaad aaan aaar aaba aabb aabc aabd aaca aacb aacc aacd aacn aacr aada aadc aana aand aara aarc aard abaa abab abac abad aban abar abb- abba abbb abbr abca abcb abcc abcd abcn abcr abda abra abrc acaa acab acac acad acan acar acba acca accc accd acda acdb acdc acr- acra acrc acrr adaa adab adac adad adan adar adba adbc adcc adda addc addd addn addr adna adra ana- anaa anab anac anad anan anar anba anbb anca ancc and- anda andr anna annb anrc arab arac arad aran arar arba arc- arca arda ardc arna arnd arr- arra arrc arrr baaa baad baan baar baba babb babr bac- baca bacc bacn bada badb badd badr bana banc band bann banr bar- bara barb barc bard barn barr bbad bbbb bbdd bbrc bcaa bcar bcbc bcca bccc bcda bcra bd-r bdbc bddc bdna bnrr brab brac brad bran brca brcb brda brna brrr c-cd caaa caab caac caan caba cac- caca cacc cacr cada cadc cadd cadr cana canc cand cann cara carb carc card carn carr cbac cbar cbbc cbca cbcc cbcn cbcr cbdb cbdc cbdn cbna cbnd cbrd cbrn ccaa ccab ccac ccad ccar ccba ccbc ccbn ccca cccb cccc ccdc ccdn ccdr ccna ccnb ccnc ccnr ccra ccrc cd-r cdaa cdac cdad cdba cdda cddb cddr cdna cdnb cdnc cnaa cnac cnbc cnda cndd cnna cnrc cnrr crab crac cran crar crbc crca crcc crcr crda crdc crna d-na daab daad daan daar daba dabb daca dada dana dand dann danr dara darb darc dard darn darr dbar dbcc dbrn dcbc dcca dccb dccc dcdb dcra dddd ddrc dnaa dnab dnac dnad dnan dnrc draa drab drac drad drar drba drbc drca drda drna drra naaa naab naac naad naan naar naba nabc naca nacc nacd nada nadc nadr nan- nana nanb nand nann nara narc nard narn narr nbaa nbad nbar nbbc nbca nbcc ncaa ncac ncar ncba ncbc ncca nccc nccn nccr ncda ncdc ncdn ncdr ncna ncnc ncnd ncra ncrc ndaa ndcc nddb ndna ndrc nndb nnnn nrab nrca nrdc nrna nrrc nrrd raab raad raan raba rabb rac- raca racc rada radc radd radr rana ranc rand rann rara rarb rbbb rbbr rcac rcbc rccb rccc rcdc rcnr rcrd rdac rdna rnbr rndc rrad rrna rrrr