-ana a-ak aaaa aaab aaac aaad aaal aaan aaba aabb aabc aabd aabl aaca aacb aacc aacd aack aacl aacn aada aadc aaka aala aalc aald aall aana aand abaa abab abac abad abak abal aban abb- abba abbb abca abcb abcc abcd abcl abcn abda abla acaa acab acac acad acan acba acbl acca accc accd acda acdb acdc ackd acla aclc adaa adab adac adad adak adal adan adba adbc adcc adda addc addd addl addn adna akaa akal akan akca akdn akka akna alaa alac alad alak alal alan alb- alba albc alca alcc ald- alda aldl alk- alka alkb alkd all- alla alll alln alna ana- anaa anab anac anad anak anal anan anba anbb anbl anca ancc and- anda andl ank- anka anla anlc anln anna annb baaa baad baak baal baan baba babb bac- baca bacc back bacn bada badb badd bak- baka bakl bala balc bald balk ball bana banc band bank bann bbad bbbb bbdd bblb bcaa bcbc bcca bccc bccl bcda bdbc bddc bdna blaa blab blac blad blak blan bldc blkb blkd c-cd caaa caab caac caal caan caba cac- caca cacc cack cada cadc cadd caka cala calc cald calk call cana canc cand cank cann cbac cbal cbbc cbca cbcc cbcl cbcn cbdb cbdc cbdn cbka cbkl cbkn cblb cblc cbln cbna cbnd ccaa ccab ccac ccad ccba ccbc ccbn ccca cccb cccc cccl ccdc ccdn ccla cclc ccna ccnb ccnc cdaa cdac cdad cdba cdda cddb cddl cdna cdnb cdnc ckac ckan ckbc ckck ckcl ckln cknb cknc clab clad clan clcd cldc cnaa cnac cnbc cnbl cnda cndd cnna d-na daab daad daal daan daba dabb daca dada daka dala dalk dall dana dand dank danl dann dbcc dbnl dcbc dcca dccb dccc dccl dcdb dddd ddlc dkba dkdc dlab dlbd dnaa dnab dnac dnad dnan kaaa kaab kaak kaal kaan kaba kabb kabc kabd kacb kacc kacd kacl kad- kada kadd kadl kaka kakc kakk kakn kala kalb kalc kald kalk kall kaln kana kanb kand kann kbaa kbab kbac kbad kbak kbal kbba kbbb kbbc kbbd kbbk kbbl kbca kbcb kbck kbcl kbdb kbdl kbdn kbkb kbkk kbkl kbla kblb kbld kbll kbna kbnd kbnl kbnn kcaa kcab kcac kcad kcal kcba kcbc kcbd kcbk kcbl kcca kccb kccc kccd kcck kccl kcda kcdc kcdd kckc kckk kckl kckn kcla kclc kclk kcll kcln kcnb kcnd kdaa kdab kdac kdad kdak kdal kdbb kdbl kdbn kdca kdcc kdcd kddb kddc kddd kddk kddl kdka kdkb kdkd kdkk kdkn kdla kdlb kdlc kdld kdll kdna kdnd kdnk kdnn kkaa kkac kkal kkan kkba kkbb kkbd kkbl kkbn kkcb kkcd kkck kkcl kkcn kkda kkdc kkdd kkdl kkkk kklb kklc kkld kkll kkln kknb kknd kknn klaa klab klac klad klak klal klan klbb klbc klbd klbl klbn klca klcb klcc klcd klck klcl klcn kldc kldd kldn klka klkc klkk klkl klkn klla kllb kllc kllk klnc klnd klnn knaa knab knac knal knan knba knbb knbc knbn knca kncb knck kncn knda kndb kndc kndd kndk kndl kndn knkk knla knlb knlc knnb knnd knnk laaa laac laad laak laal laan laba laca lacc lack lacl lada ladd laka lala lald lall lan- lana lanc land lank lann lbcc lcac lcad lcbc lcca lccc lcdd lkab lkal lkan llan llcc lldb lldc lllc llll lndn lnnk naaa naab naac naad naal naan naba nabc nabk nabl naca nacc nacd nack nacl nada nadc nadk naka nala nalc nald nall nan- nana nanb nand nann nbaa nbad nbak nbbc nbca nbcc ncaa ncac ncba ncbc ncca nccc nccn ncda ncdc ncdn nclc ncln ncna ncnc ncnd ndaa ndak ndcc nddb ndna nlab nlcc nndb nnnn