a-a a-b a-c aaa aab aac aad aan aao aar ab- aba abb abc abd abn abo abr ac- aca acb acc acd acn aco acr ad- ada adb adc add adn ado adr an- ana anb anc and ann ano anr aoa aob aoc aod aon aoo aor ar- ara arb arc ard arn aro arr baa bab bac bad ban bao bar bba bbb bbc bbd bbn bbo bbr bca bcb bcc bcd bcn bco bcr bda bdb bdc bdd bdo bdr bna bnb bnc bnd bnn bno bnr boa bob boc bod bon boo bor bra brb brd brn bro brr c-- caa cab cac cad can cao car cba cbb cbc cbd cbn cbo cbr cca ccb ccc ccd ccn cco ccr cda cdb cdc cdd cdn cdo cdr cn- cna cnb cnc cnd cnn cno cnr co- coa cob coc cod con coo cor cra crb crc crd crn cro crr daa dab dac dad dan dao dar dba dbb dbc dbd dbn dbo dbr dca dcb dcc dcd dcn dco dcr dda ddb ddc ddd ddn ddo ddr dna dnb dnc dnd dnn dno dnr doa dob doc dod don doo dor dra drb drc drd drn dro drr naa nab nac nad nan nao nar nba nbb nbc nbd nbn nbo nbr nca ncb ncc ncd ncn nco ncr nda ndb ndc ndd ndn ndo ndr nna nnb nnc nnn nno no- noa nob noc nod non noo nor nra nrb nrc nrd nrn nro nrr oaa oab oac oad oan oao oar ob- oba obb obc obd obn obo obr oc- oca ocb occ ocd ocn oco ocr oda odb odc odd odn odo odr on- ona onb onc ond onn ono onr oo- ooa oob ooc ood oon ooo oor or- ora orb orc ord orn oro orr ra- raa rab rac rad ran rao rar rba rbb rbc rbd rbn rbo rbr rca rcb rcc rcd rcn rco rcr rda rdb rdc rdd rdn rdo rdr rna rnb rnc rnd rnn rno rnr roa rob roc rod ron roo ror rra rrb rrc rrd rrn rrr

-ana a-do aaaa aaab aaac aaad aaan aaar aaba aabb aabc aabd aaca aacb aacc aacd aacn aaco aacr aada aadc aana aand aaon aaoo aara aarc aard aaro abaa abab abac abad aban abar abb- abba abbb abbo abbr abca abcb abcc abcd abcn abcr abda abdo aboa abob abod abon aboo abor abra abrc abro acaa acab acac acad acan acar acba acca accc accd acco acda acdb acdc acoa acod acon acor acr- acra acrc acro acrr adaa adab adac adad adan adao adar adba adbc adcc adda addc addd addn addo addr adna adob adoc adod adon adoo ador adra adro ana- anaa anab anac anad anan anao anar anba anbb anbo anca ancc anco and- anda ando andr anna annb anno ano- anoa anod anon anor anrc aoba aoca aonb aono aora aorb aorn arab arac arad aran arar arba arc- arca arco arda ardc ardo arna arnd arno aroa arob arod aron aroo aror arr- arra arrc arro arrr baaa baad baan baar baba babb babo babr bac- baca bacc bacn baco bada badb badd bado badr bana banc band bann bano banr baon bar- bara barb barc bard barn baro barr bbad bbbb bbdd bbdo bbrc bcaa bcar bcbc bcca bccc bcda bcor bcra bd-r bdbc bddc bdna bnoc bnor bnrr boab boac boad boan boar boba bobb bobo boca boco boda bodb bodo bona bonc bond bonn bono boob booc bood boon boor bor- bora bord born boro borr brab brac brad bran brao brca brcb brda brdo brna brno broa brob broc brod bron broo bror brrr c-bo c-cd caaa caab caac caan caba cabo cac- caca cacc caco cacr cada cadc cadd cado cadr cana canc cand cann cano caod caor cara carb carc card carn caro carr cbac cbar cbbc cbca cbcc cbcn cbcr cbdb cbdc cbdn cbdo cbna cbnd cbrd cbrn ccaa ccab ccac ccad ccar ccba ccbc ccbn ccca cccb cccc ccdc ccdn ccdr ccna ccnb ccnc ccnr ccob ccoc ccod ccra ccrc cd-r cdaa cdac cdad cdba cdda cddb cddr cdna cdnb cdnc cdon cnaa cnac cnbc cnco cnda cndd cnna cnrc cnrr coad coan coba cobb cobo coca coco coda codd con- cona conc cond conn cono coob cood coon cor- cora corb corc cord corn coro corr crab crac cran crar crbc crca crcc crcr crda crdc crna crob croc crod cron croo cror d-bo d-na daab daad daan daar daba dabb dabo daca dada dado dana dand dann dano danr daon dara darb darc dard darn daro darr dbar dbcc dbrn dcbc dcca dccb dccc dcdb dcon dcra dddd ddoc ddrc dnaa dnab dnac dnad dnan dnoc dnrc doab doan doar doba dobb doca doco dod- doda dodd dodo dona donc dond donn dono donr doob dood doon door dora dorc dord dorn doro dorr draa drab drac drad drar drba drbc drca drda drna drno drob drod dron drra naaa naab naac naad naan naar naba nabc nabo naca nacc nacd naco nada nadc nadr nan- nana nanb nand nann nano naoc naor nara narc nard narn naro narr nbaa nbad nbar nbbc nbbo nbca nbcc nbco ncaa ncac ncar ncba ncbc ncca nccc nccn nccr ncda ncdc ncdn ncdr ncna ncnc ncnd ncoa ncoc ncor ncra ncrc ndaa ndao ndcc nddb nddo ndna ndoc ndor ndrc nndb nnnn noaa noac noba nobc nobo noco noda nodo non- nona nonn nono noo- noob noon nooo noor nor- nora norb norc nord norn noro norr nrab nrca nrdc nrna nroc nron nrrc nrrd oara obad oban obba obbo obon obor obra obro ocab ocac ocad ocan ocbc occa occc occn ocna ocon ocra ocro ocrr odac odbo odda oddd odnb odon odoo odor odra onab onan onar onc- onca oncd onco onda ondo onna onno onod onon onor onra ooaa ooba oocr ooda oona oooo oora oord