a-a a-b a-c aaa aab aac aah aao aar aas aax ab- aba abb abc abh abo abr abs abx ac- aca acb acc ach aco acr acs acx aha ahb ahc ahh aho ahr ahs ahx aoa aob aoc aoh aoo aor aos aox ar- ara arb arc arh aro arr ars arx as- asa asb asc ash aso asr ass asx ax- axa axh axo axr axs axx baa bab bac bah bao bar bas bax bba bbb bbc bbh bbo bbr bbs bbx bca bcb bcc bch bco bcr bcs bcx bha bhb bhc bhh bho bhr bhs bhx boa bob boc boh boo bor bos box bra brb brh bro brr brs brx bsa bsb bsc bsh bso bsr bss bsx bxb bxo bxx c-- caa cab cac cah cao car cas cax cba cbb cbc cbh cbo cbr cbs cbx cca ccb ccc cch cco ccr ccs ccx ch- cha chb chc chh cho chr chs chx co- coa cob coc coh coo cor cos cox cra crb crc crh cro crr crs crx csa csb csc csh cso csr css csx cxc cxh cxo cxr cxs cxx haa hab hac hah hao har has hax hba hbb hbc hbh hbo hbr hbs hbx hca hcb hcc hch hco hcr hcs hha hhb hhc hhh hho hhr hhs hoa hob hoc hoh hoo hor hos hox hr- hra hrb hrc hrh hro hrr hrs hsa hsb hsc hsh hsr hss hsx hxc oaa oab oac oah oao oar oas oax ob- oba obb obc obh obo obr obs obx oc- oca ocb occ och oco ocr ocs ocx oha ohc ohh oho ohr ohs oo- ooa oob ooc ooh ooo oor oos oox or- ora orb orc orh oro orr ors orx os- osa osb osc osh oso osr oss osx ox- oxa oxb oxc oxo oxx ra- raa rab rac rah rao rar ras rax rba rbb rbc rbh rbo rbr rbs rbx rca rcb rcc rch rco rcr rcs rcx rh- rha rhb rhc rhh rho rhr rhs roa rob roc roh roo ror ros rox rra rrb rrc rrh rrr rrs rsa rsb rsc rsh rso rsr rss rsx rxr rxs saa sab sac sah sao sar sas sax sba sbb sbc sbh sbo sbr sbs sbx sca scb scc sch sco scr scs scx sh- sha shb shc shh sho shr shs soa sob soc soh soo sor sos sox sr- sra srb src srh sro srr srs srx ss- ssa ssb ssc ssh sso ssr sss ssx sxc sxs xaa xac xar xas xbc xbr xbx xcb xch xcr xcx xoa xoc xoo xor xos xox xrc xrx xsa xsb xsc xss xxo xxx

a-ha aaaa aaab aaac aaah aaar aaas aaba aabb aabc aabh aaca aacb aacc aach aaco aacr aacs aaha aahs aaoo aara aarc aaro aars aasa aasc aass abaa abab abac abar abas abax abb- abba abbb abbo abbr abbs abca abcb abcc abch abcr abcs abha abho abhr abhs aboa abob aboh aboo abor abos abox abra abrc abro abrs abs- absa abss acaa acab acac acar acas acba acca accc acch acco accs acha achh acho achr achs acoa acoh acor acos acr- acra acrc acro acrr acrs acsa acsc acss ahab ahac ahah ahar ahas ahha ahhs ahoa ahor ahra ahrc ahrr ahrs ahsa ahso ahss aoah aoba aoca aocs aora aorb aors aoss arab arac arah arar aras arax arba arbh arbs arc- arca arch arco arcs arh- arhs aroa arob aroo aror aros arr- arra arrc arrh arro arrr arrs ars- arsa arsc arso asaa asab asac asah asao asar asas asba asbo asc- asca ascb ascc asch asco ascr ascx asha ashs ashx asob asoc asor asos asra asrc asro asrs assa assc assh asso assr asss axar axo- axoa axos axxo ba-x baaa baah baar baas baba babb babo babr babs bac- baca bacc bach baco bacs baha baho bahr bahs baoh baos bar- bara barb barc barh baro barr bars barx basa basc bash baso bass bbas bbbb bbbs bbch bbhs bbox bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bchs bcor bcos bcra bcrs bcsa bcsc bcss bhao bhar bhca bhcc bhhs bhor bhra boab boac boar boas boba bobb bobo bobs boca boch boco bocs boha boho bohr bohs boob booc booh boor boos boox bor- bora borh boro borr bors bosa bosc bosh boso boss boxa brab brac brah brao bras brax brca brcb brhs broa brob broc broh broo bror bros brox brrr brrs brsb brsr bsaa bsac bsas bscs bshs bsos bsra bssc c-bo caaa caab caac caah caas caba cabo cabs cac- caca cacc cach caco cacr caha cahs caor caos cara carb carc caro carr cars carx casa casb casc cash caso casr cass caxa cbac cbar cbax cbbc cbbs cbca cbcc cbcr cbcs cbha cbhs cbox cbrh cbsa cbsc cbxa ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccs ccha cchr cchs ccob ccoc ccra ccrc ccrs ccsa ccss chaa chab chac chah chao char chas chax chca chch chcs chha chhs choc choh choo chor chos chra chrb chrc chro chrr chrs chsc chsh chsr coas coax coba cobb cobh cobo cobs coca coch coco coha coho cohs coob cooh coos cor- cora corb corc coro corr cors cosa cosc cosh coso coss coxa crab crac crar cras crax crbc crca crcc crcr crhs crob croc croh croo cror crsa crss csaa csab csac csao csar csas cscb cscc csch csco cscr cscs cshs csob csor csos csox csra csrc csrs cssa cssr cxro cxxx haab haar haas haba habo habs haco hacs haha haho hahs haor hara harc harh haro harr hars hasa hasc hash hass haxo hbar hbbs hbhs hboc hbos hbox hbrs hbss hcbc hcbs hcca hccb hccc hcch hccs hchs hcsa hcsc hcso hcss hhaa hhhh hhhs hoac hoar hoas hoax hoba hobo hobs hoca hoch hocr hocs hoha hoho hoor hoos