a-a a-b a-c aaa aab aac aaj aak aao aar aas ab- aba abb abc abj abk abo abr abs ac- aca acb acc acj ack aco acr acs aja ajb ajc ajj ajk ajo ajr ajs aka akb akc akj akk ako akr aks aoa aob aoc aoj aok aoo aor aos ar- ara arb arc arj ark aro arr ars as- asa asb asc asj ask aso asr ass baa bab bac baj bak bao bar bas bba bbb bbc bbk bbo bbr bbs bca bcb bcc bcj bck bco bcr bcs bja bjc bjj bjk bjr bjs bka bkb bkc bkk bko bkr bks boa bob boc boj bok boo bor bos bra brb brj brk bro brr brs bsa bsb bsc bsj bsk bso bsr bss c-- c-j caa cab cac caj cak cao car cas cba cbb cbc cbj cbk cbo cbr cbs cca ccb ccc ccj cck cco ccr ccs cja cjb cjc cjk cjr cjs cka ckb ckc cko cks co- coa cob coc coj cok coo cor cos cra crb crc crj crk cro crr crs csa csb csc csj csk cso csr css jaa jab jac jaj jak jao jar jas jba jbc jbj jbk jbo jbr jbs jca jcb jcc jck jco jcr jcs jja jjb jjc jjj jjk jjr jjs jka jkb jkk jko jkr jks joa job joc joj jok joo jor jos jra jrb jrc jrk jro jrr jrs jsa jsb jsc jsj jsk jso jsr jss ka- kaa kab kac kaj kak kao kar kas kba kbb kbc kbk kbo kbr kbs kca kcb kcc kck kcr kcs kjb kjc kjr kjs kkb kkc kkk kkr kks koa kob koc kok koo kor kos kra krc krk kro krr krs ksa ksb ksc ksk kso ksr kss oaa oab oac oaj oak oao oar oas ob- oba obb obc obj obk obo obr obs oc- oca ocb occ ocj ock oco ocr ocs oja ojb ojc ojo ojs oka okb okc okj okk oko okr oks oo- ooa oob ooc ook ooo oor oos or- ora orb orc ork oro orr ors os- osa osb osc osj osk oso osr oss ra- raa rab rac raj rak rao rar ras rba rbb rbc rbk rbo rbr rbs rca rcb rcc rcj rco rcr rcs rja rjc rjk rjr rkb rkc rkk rko rks roa rob roc roj rok roo ror ros rra rrb rrc rrk rrr rrs rsa rsb rsc rsj rsk rso rsr rss saa sab sac saj sak sao sar sas sba sbb sbc sbj sbk sbo sbr sbs sca scb scc scj sck sco scr scs sja sjb sjc sjj sjk sjr sjs sk- ska skb skc skj skk sko skr sks soa sob soc soj sok soo sor sos sr- sra srb src srj srk sro srr srs ss- ssa ssb ssc ssj ssk sso ssr sss

a-ak a-ok aaaa aaab aaac aaar aaas aaba aabb aabc aaca aacb aacc aack aaco aacr aacs aaka aaoo aara aarc aaro aars aasa aasc aass abaa abab abac abaj abak abar abas abb- abba abbb abbo abbr abbs abca abcb abcc abcr abcs abjs aboa abob abok aboo abor abos abra abrc abro abrs abs- absa abss acaa acab acac acar acas acba acca accc acco accs acks acoa acor acos acr- acra acrc acro acrr acrs acsa acsc acss ajab ajac ajak ajao ajar ajas ajba ajka ajob ajoo ajss akaa akao akar akas akca akka akko akok akos akr- akra aksa aoba aoca aocs aoks aora aorb aors aoss arab arac arak arar aras arba arbs arc- arca arco arcs arja arjo arka arko arks aroa arob aroo aror aros arr- arra arrc arrk arro arrr arrs ars- arsa arsc arsk arso asaa asab asac asak asao asar asas asba asbo asc- asca ascb ascc ascj asco ascr asja aska asko askr asks asob asoc asok asor asos asra asrc asro asrs assa assc assk asso assr asss baaa baak baar baas baba babb babo babr babs bac- baca bacc back baco bacs baja bajs bak- baka bako bakr baks baos bar- bara barb barc bark baro barr bars basa basc bask baso bass bbas bbbb bbbs bbrc bcaa bcar bcas bcbc bcbs bcca bccc bccs bcor bcos bcra bcrs bcsa bcsc bcss bjcc bjoa boab boac boak boar boas boba bobb bobo bobs boca bock boco bocs bojo boka boko boks boob booc book boor boos bor- bora borj bork boro borr bors bosa bosc bosk boso boss brab brac braj brak brao bras brca brcb brka brkb broa brob broc brok broo bror bros brrr brrs brsb brsr bsaa bsac bsas bscs bsos bsra bssc c-bo caaa caab caac caas caba cabo cabs cac- caca cacc cack caco cacr caja caka caor caos cara carb carc carj cark caro carr cars casa casb casc cask caso casr cass cbac cbar cbbc cbbs cbca cbcc cbcr cbcs cbka cbkj cbko cbkr cbrj cbsa cbsc ccaa ccab ccac ccar ccas ccba ccbc ccca cccb cccc cccs ccjo ccob ccoc ccra ccrc ccrs ccsa ccss cjar cjbc cjbk cjca cjcb cjcj cjcs cjob cjor cjrb cjrc cjrj cjrs cjsb cjss ckac ckbc ckck ckco ckcs ckjr ckjs ckoa ckob ckoc ckoo ckor ckos ckrc cksa cksb ckso coak coas coba cobb cobo cobs coca cock coco cojo cok- coka coko coob cook coos cor- cora corb corc cork coro corr cors cosa cosc coso coss crab crac craj crar cras crbc crca crcc crcr crkc crob croc crok croo cror crsa crss csaa csab csac csak csao csar csas cscb cscc csco cscr cscs cska csks csob csor csos csra csrc csrs cssa cssr j-ro jaak jaar jaas jaba jabo jabr jabs jaca jacc jack jaco jacs jaja jaka jako jara jarc jark jaro jarr jars jasa jasc jask jaso jass jbaa jbar jbob jcbc jccc jcrc jcss jjar jjcc jkcs joab joao joar joba jobo jobs joca jock joco jojo joka jokb