a-a a-b a-c a-t aaa aab aac aaf aan aao aar aas aat ab- aba abb abc abf abn abo abr abs abt ac- aca acb acc acf acn aco acr acs act af- afa afb afc aff afn afo afr afs aft an- ana anb anc anf ann ano anr ans ant aoa aob aoc aof aon aoo aor aos aot ar- ara arb arc arf arn aro arr ars art as- asa asb asc asf asn aso asr ass ast at- ata atb atc atf atn ato atr ats att baa bab bac baf ban bao bar bas bat bba bbb bbc bbf bbn bbo bbr bbs bbt bca bcb bcc bcf bcn bco bcr bcs bct bfa bfb bfc bff bfn bfo bfr bfs bft bna bnb bnc bnf bnn bno bnr bns bnt boa bob boc bof bon boo bor bos bot bra brb brf brn bro brr brs brt bsa bsb bsc bsf bsn bso bsr bss bst bta btb btc btf btn bto btr bts btt c-- caa cab cac caf can cao car cas cat cba cbb cbc cbf cbn cbo cbr cbs cbt cca ccb ccc ccf ccn cco ccr ccs cct cfa cfb cfc cff cfn cfo cfr cfs cft cn- cna cnb cnc cnf cnn cno cnr cns cnt co- coa cob coc cof con coo cor cos cot cra crb crc crf crn cro crr crs crt csa csb csc csf csn cso csr css cst cta ctb ctc ctf ctn cto ctr cts ctt faa fab fac faf fan fao far fas fat fba fbb fbc fbf fbn fbo fbr fbs fbt fca fcb fcc fcf fcn fco fcr fcs fct ffa ffc fff ffn ffo ffr ffs fft fna fnb fnc fnf fnn fnr fns fnt foa fob foc fof fon foo for fos fot fra frb frc frf frn fro frr frs frt fsa fsb fsc fsf fsn fso fsr fss fst fta ftb ftc ftf ftn fto ftr fts ftt naa nab nac naf nan nao nar nas nat nba nbb nbc nbf nbn nbo nbr nbs nbt nca ncb ncc ncf ncn nco ncr ncs nct nfa nfb nfc nff nfn nfo nfr nfs nft nna nnb nnc nnf nnn nno nns nnt no- noa nob noc nof non noo nor nos not nra nrb nrc nrf nrn nro nrr nrs nrt nsa nsb nsc nsf nsn nso nsr nss nst nta ntb ntc ntf ntn nto ntr nts ntt oaa oab oac oaf oan oao oar oas oat ob- oba obb obc obf obn obo obr obs obt oc- oca ocb occ ocf ocn oco ocr ocs oct of- ofa ofb ofc off ofn ofo ofr ofs oft on- ona onb onc onf onn ono onr ons ont oo- ooa oob ooc oof oon ooo oor oos oot or- ora orb orc orf orn oro orr ors ort os- osa osb osc osf osn oso osr oss ost ot- ota otb otc otf otn oto otr ots ott ra- raa rab rac raf ran rao rar ras rat rba rbb rbc rbf rbn rbo rbr rbs rbt rca rcb rcc rcf rcn rco rcr rcs rct rfa rfb rfc rff rfn rfo rfr rfs rft rna rnb rnc rnn rno rnr rns rnt roa rob roc rof ron roo ror ros rot rra rrb rrc rrf rrn rrr rrs rrt rsa rsb rsc rsf rsn rso rsr rss rst rta rtb rtc rtf rtn rto rtr rts rtt saa sab sac saf san sao sar sas sat sba sbb sbc sbf sbn sbo sbr sbs sbt sca scb scc scf scn sco scr scs sct sfa sfb sfc sff sfn sfo sfr sfs sft sna snb snc snf snn sno snr sns snt soa sob soc sof son soo sor sos sot sr- sra srb src srf srn sro srr srs srt ss- ssa ssb ssc ssf ssn sso ssr sss sst sta stb stc stf stn sto str sts stt taa tab tac taf tan tao tar tas tat tba tbb tbc tbf tbn tbo tbr tbs tbt tca tcb tcc tcf tcn tco tcr tcs tct tfa tfb tfc tff tfn tfo tfr tfs tft tna tnb tnc tnf tnn tno tnr tns tnt to- toa tob toc tof ton too tor tos tot tra trb trc trf trn tro trr trs trt tsa tsb tsc tsf tsn tso tsr tss tst tta ttb ttc ttf ttn tto ttr tts ttt

-ana aaaa aaab aaac aaaf aaan aaar aaas aaba aabb aabc aabt aaca aacb aacc aacf aacn aaco aacr aacs aact aafa aafb aafc aaff aana aaon aaoo aara aarc aaro aars aart aasa aasc aasf aass aast aata aatc aatf aatt abaa abab abac abaf aban abar abas abat abb- abba abbb abbo abbr abbs abbt abca abcb abcc abcf abcn abcr abcs abct abff aboa abob abof abon aboo abor abos abot abra abrc abro abrs abs- absa absf abss abta abts ac-t acaa acab acac acan acar acas acat acba acca accc accf acco accs acct acfc acfs acft acoa acon acor acos acot acr- acra acrc acro acrr acrs acsa acsc acss acst acta actc actf acto acts actt afaa afan afao afar afat afbs afca afcb afcc afcs affa affc affo affs afft afoa afoo afor afr- afra afrc afro afrs afsa afsb afsc afst afta aftc aftn afts ana- anaa anab anac anan anao anar anas anat anba anbb anbo anca ancc anco anct anfa anfo anna annb anno anns annt ano- anoa anon anor anos anrc ansa ansf anso ant- anta anto antr ants antt aoba aoca aocs aonb aono aont aora aorb aorn aors aort aoss aotc aotf arab arac araf aran arar aras arat arba arbs arc- arca arco arcs arct arfa arfb arfc arff arfs arft arna arno arns arnt aroa arob aron aroo aror aros arr- arra arrc arro arrr arrs arrt ars- arsa arsc arso arst arta artc