a-a a-b a-c a-t aaa aab aac aan aao aas aat ab- aba abb abc abn abo abs abt ac- aca acb acc acn aco acs act an- ana anb anc ann ano ans ant aoa aob aoc aon aoo aos aot as- asa asb asc asn aso ass ast at- ata atb atc atn ato ats att baa bab bac ban bao bas bat bba bbb bbc bbn bbo bbs bbt bca bcb bcc bcn bco bcs bct bna bnb bnc bnn bno bns bnt boa bob boc bon boo bos bot bsa bsb bsc bsn bso bss bst bta btb btc btn bto bts btt c-- caa cab cac can cao cas cat cba cbb cbc cbn cbo cbs cbt cca ccb ccc ccn cco ccs cct cn- cna cnb cnc cnn cno cns cnt co- coa cob coc con coo cos cot csa csb csc csn cso css cst cta ctb ctc ctn cto cts ctt naa nab nac nan nao nas nat nba nbb nbc nbn nbo nbs nbt nca ncb ncc ncn nco ncs nct nna nnb nnc nnn nno nns nnt no- noa nob noc non noo nos not nsa nsb nsc nsn nso nss nst nta ntb ntc ntn nto nts ntt oaa oab oac oan oao oas oat ob- oba obb obc obn obo obs obt oc- oca ocb occ ocn oco ocs oct on- ona onb onc onn ono ons ont oo- ooa oob ooc oon ooo oos oot os- osa osb osc osn oso oss ost ot- ota otb otc otn oto ots ott saa sab sac san sao sas sat sba sbb sbc sbn sbo sbs sbt sca scb scc scn sco scs sct sna snb snc snn sno sns snt soa sob soc son soo sos sot ss- ssa ssb ssc ssn sso sss sst sta stb stc stn sto sts stt taa tab tac tan tao tas tat tba tbb tbc tbn tbo tbs tbt tca tcb tcc tcn tco tcs tct tna tnb tnc tnn tno tns tnt to- toa tob toc ton too tos tot tsa tsb tsc tsn tso tss tst tta ttb ttc ttn tto tts ttt

-ana aaaa aaab aaac aaan aaas aaba aabb aabc aabt aaca aacb aacc aacn aaco aacs aact aana aaon aaoo aasa aasc aass aast aata aatc aatt abaa abab abac aban abas abat abb- abba abbb abbo abbs abbt abca abcb abcc abcn abcs abct aboa abob abon aboo abos abot abs- absa abss abta abts ac-t acaa acab acac acan acas acat acba acca accc acco accs acct acoa acon acos acot acsa acsc acss acst acta actc acto acts actt ana- anaa anab anac anan anao anas anat anba anbb anbo anca ancc anco anct anna annb anno anns annt ano- anoa anon anos ansa anso ant- anta anto ants antt aoba aoca aocs aonb aono aont aoss aotc asaa asab asac asan asao asas asat asba asbo asc- asca ascb ascc asco asct asnc asno asob asoc ason asos asot assa assc assn asso asss asst asta astb astc asto asts at-t ataa atab atac atan atas atat atbs atca atcc atco atcs atna atno atns atob atoc aton atos atot atsb atsc atst atta attn atto atts baaa baan baas baat baba babb babo babs bac- baca bacc bacn baco bacs bact bana banc bann bano bans bant baon baos basa basc baso bass bast bata batc batn bato bats batt bbas bbbb bbbs bcaa bcas bcat bcbc bcbs bcca bccc bccs bcos bcsa bcsc bcsn bcss bctc bcts bnas bnoc bnss bnta boab boac boan boas boat boba bobb bobo bobs boca boco bocs bona bonc bonn bono bons bont boob booc boon boos boot bosa bosc bosn boso boss bost bota botb botn boto bots bott bsaa bsac bsas bsat bscs bsns bson bsos bssc bsts btaa btan btcc btcs btob btss bttb c-bo caaa caab caac caan caas caat caba cabo cabs cac- caca cacc caco cana canc cann cano cans cant caos casa casb casc caso cass cast cat- cata catb catc cato cats catt cbac cbat cbbc cbbs cbca cbcc cbcn cbcs cbct cbna cbot cbsa cbsc cbsn cbta cbtc ccaa ccab ccac ccas ccat ccba ccbc ccbn ccca cccb cccc cccs ccna ccnb ccnc ccns ccob ccoc ccsa ccsn ccss ccst cctb cctc cctt cnaa cnac cnas cnbc cnco cnna cnsa cnss cnta cntc coan coas coat coba cobb cobo cobs coca coco coct con- cona conc conn cono cons cont coob coon coos coot cosa cosc coso coss cost cota cotb cotc cotn coto cots cott csaa csab csac csao csas csat cscb cscc csco cscs csob csos csot cssa csta cstc csto csts ctab ctan ctba ctbs ctca ctns ctos ctot ctsa ctsc ctsn ctss ctta cttn ctts naaa naab naac naan naas naat naba nabc nabo nabs naca nacc naco nacs nan- nana nanb nann nano nans nant naoc naos naot nas- nasa nasb nasc naso nass nast nata natc nato nats natt nbaa nbas nbbc nbbo nbca nbcc nbco nbcs ncaa ncac ncat ncba ncbc ncbs ncca nccc nccn nccs ncct ncna ncnc ncoa ncoc ncos ncsa ncsc ncss ncst ncta nctc nnnn nnos nnot nnsa nnss nntn noaa noac noat noba nobc nobo nobs noco nocs noct non- nona nonn nono nons nont noo- noob noon nooo noos noot nos- nosa noss nost not- nota noto nots nott nsaa nsac nsbo nsca nscc nscs nsna nsos nssa nssb nssc nsso nsss nstc nsts ntbc ntcc ntsb ntsc ntss ntto oasc oass oast oats oban obas obba obbo obon obos obot obsn obss obst obts ocab ocac ocan ocas ocat ocbc occa occc occn occt ocna ocon ocos ocsa oct- octa octo octs onab onan onas onat onc- onca onco onct onna onno onon onos onsc onso onst ont- ontc onto ooaa ooba oona oons oont oooo ooos oosa oost ootb oots osan osas osat osba osca oscc osco osno osoo osos