-al -ol a-a a-b a-c aaa aab aac aaf aah aal aao aar aas ab- aba abb abc abf abh abl abo abr abs ac- aca acb acc acf ach acl aco acr acs af- afa afb afc aff afh afl afo afr afs aha ahb ahc ahf ahh ahl aho ahr ahs al- ala alb alc alf alh all alo alr als aoa aob aoc aof aoh aol aoo aor aos ar- ara arb arc arf arh arl aro arr ars as- asa asb asc asf ash asl aso asr ass baa bab bac baf bah bal bao bar bas bba bbb bbc bbf bbh bbl bbo bbr bbs bca bcb bcc bcf bch bcl bco bcr bcs bfa bfb bfc bff bfh bfl bfo bfr bfs bha bhb bhc bhf bhh bhl bho bhr bhs bla blb blc blf blh bll blo blr bls boa bob boc bof boh bol boo bor bos bra brb brf brh brl bro brr brs bsa bsb bsc bsf bsh bsl bso bsr bss c-- caa cab cac caf cah cal cao car cas cba cbb cbc cbf cbh cbl cbo cbr cbs cca ccb ccc ccf cch ccl cco ccr ccs cfa cfb cfc cff cfh cfl cfo cfr cfs ch- cha chb chc chf chh chl cho chr chs cl- cla clb clc clf clh cll clo clr cls co- coa cob coc cof coh col coo cor cos cra crb crc crf crh crl cro crr crs csa csb csc csf csh csl cso csr css faa fab fac faf fah fal fao far fas fba fbb fbc fbf fbh fbl fbo fbr fbs fca fcb fcc fcf fcl fco fcr fcs ffa ffc fff ffh ffl ffo ffr ffs fha fhb fhc fhf fhh fhl fho fhr fhs fla flb flc flf fll flo flr fls foa fob foc fof foh fol foo for fos fra frb frc frf frh frl fro frr frs fsa fsb fsc fsf fsh fsl fso fsr fss haa hab hac haf hah hal hao har has hba hbb hbc hbf hbh hbl hbo hbr hbs hca hcb hcc hcf hch hcl hco hcr hcs hfa hfb hfc hff hfh hfl hfo hfr hfs hha hhb hhc hhf hhh hhl hho hhr hhs hla hlb hlc hlf hlh hll hlo hlr hls hoa hob hoc hof hoh hol hoo hor hos hr- hra hrb hrc hrf hrh hrl hro hrr hrs hsa hsb hsc hsf hsh hsl hsr hss la- laa lab lac laf lah lal lao lar las lba lbb lbc lbf lbh lbl lbo lbr lbs lca lcb lcc lcf lch lcl lco lcr lcs lfa lfb lfc lff lfh lfl lfo lfr lfs lha lhb lhc lhf lhh lho lhr lhs lla llb llc llf lll llo llr lls loa lob loc lof loh lol loo lor los lra lrb lrc lrf lrh lro lrr lrs lsa lsb lsc lsf lsh lsl lso lsr lss oaa oab oac oaf oah oal oao oar oas ob- oba obb obc obf obh obl obo obr obs oc- oca ocb occ ocf och ocl oco ocr ocs of- ofa ofb ofc off ofl ofo ofr ofs oha ohc ohf ohh ohl oho ohr ohs ola olb olc olf oll olo ols oo- ooa oob ooc oof ooh ool ooo oor oos or- ora orb orc orf orh orl oro orr ors os- osa osb osc osf osh osl oso osr oss ra- raa rab rac raf rah ral rao rar ras rba rbb rbc rbf rbh rbl rbo rbr rbs rca rcb rcc rcf rch rcl rco rcr rcs rfa rfb rfc rff rfh rfl rfo rfr rfs rh- rha rhb rhc rhf rhh rhl rho rhr rhs rla rlc rlf rlh rll rlo rlr rls roa rob roc rof roh rol roo ror ros rra rrb rrc rrf rrh rrl rrr rrs rsa rsb rsc rsf rsh rsl rso rsr rss saa sab sac saf sah sal sao sar sas sba sbb sbc sbf sbh sbl sbo sbr sbs sca scb scc scf sch scl sco scr scs sfa sfb sfc sff sfh sfl sfo sfr sfs sh- sha shb shc shf shh shl sho shr shs sla slb slc slf slh sll slo slr sls soa sob soc sof soh sol soo sor sos sr- sra srb src srf srh srl sro srr srs ss- ssa ssb ssc ssf ssh ssl sso ssr sss

a-ha aaaa aaab aaac aaaf aaah aaal aaar aaas aaba aabb aabc aabh aabl aaca aacb aacc aacf aach aacl aaco aacr aacs aafa aafb aafc aaff aafl aaha aahl aahs aala aalc aall aalo aals aaoo aara aarc aaro aars aasa aasc aasf aass abaa abab abac abaf abal abar abas abb- abba abbb abbo abbr abbs abca abcb abcc abcf abch abcl abcr abcs abff abha abho abhr abhs abla ablo abls aboa abob abof aboh abol aboo abor abos abra abrc abro abrs abs- absa absf absl abss acaa acab acac acar acas acba acbl acca accc accf acch acco accs acfc acfl acfs acha achh achl acho achr achs acla aclc aclr acls acoa acoh acol acor acos acr- acra acrc acro acrr acrs acsa acsc acsl acss afaa afao afar afbs afca afcb afcc afch afcs affa affc affo affs afhs afla aflc afoa afol afoo afor afr- afra afrc afro afrs afsa afsb afsc ahab ahac ahah ahal ahar ahas ahfa ahha ahhs ahla ahoa ahor ahra ahrc ahrr ahrs ahsa ahso ahss alaa alac alal alao alar alas alb- alba albc albo albs alca alcc alco alcs alfa alfs alha alhs all- alla allh alll allo allr alls aloa aloc alof aloh alol aloo alor alos alro alsa alsc also aoah aoba aoca aocs aola aora aorb aors aoss arab arac araf arah aral arar aras arba arbh arbs arc- arca arch arco arcs arfa arfb arfc arff arfs arh- arhs arla arlo aroa arob aroo aror aros arr- arra