a-ak a-ha aaaa aaab aaac aaah aaas aaba aabb aabc aabh aaca aacb aacc aach aack aacs aaha aahk aahs aaka aasa aasc aass abaa abab abac abak abas abb- abba abbb abbs abca abcb abcc abch abcs abha abhs abs- absa abss acaa acab acac acas acba acca accc acch accs acha achh achs acks acsa acsc acss ahab ahac ahah ahas ahha ahhs ahsa ahss akaa akah akas akca akha akhs akka aksa asaa asab asac asah asak asas asba asc- asca ascb ascc asch asha ashk ashs aska asks assa assc assh assk asss baaa baah baak baas baba babb babs bac- baca bacc bach back bacs baha bahs bak- baka bakh baks basa basc bash bask bass bbas bbbb bbbs bbch bbhs bcaa bcas bcbc bcbs bcca bccc bccs bchs bcsa bcsc bcss bhca bhcc bhhs bkhs bsaa bsac bsas bscs bshs bssc caaa caab caac caah caas caba cabs cac- caca cacc cach cack caha cahs caka casa casb casc cash cask cass cbac cbbc cbbs cbca cbcc cbcs cbha cbhs cbka cbsa cbsc ccaa ccab ccac ccas ccba ccbc ccca cccb cccc cccs ccha cchs ccsa ccss chaa chab chac chah chak chas chca chch chcs chha chhs chka chkb chks chsc chsh ckac ckbc ckch ckck ckcs ckhs cksa cksb cksh csaa csab csac csak csas cscb cscc csch cscs cshs cska csks cssa haab haak haas haba habs hack hacs haha hahs haka hakk haks hasa hasc hash hask hass hbbs hbhs hbss hcbc hcbs hcca hccb hccc hcch hccs hchs hcsa hcsc hcss hhaa hhhh hhhs hkcc hkcs hsac hsas hsbc hscc hshs kaaa kaab kaak kaas kaba kabb kabc kacb kacc kach kacs kaha kahc kahs kaka kakc kakh kakk kaks kas- kasa kasb kasc kash kask kass kbaa kbab kbac kbak kbas kbba kbbb kbbc kbbk kbbs kbca kbcb kbch kbck kbcs kbhb kbhc kbhh kbhs kbkb kbkk kbsa kbsb kbsk kbss kcaa kcab kcac kcah kcas kcba kcbc kcbk kcbs kcca kccb kccc kcck kcha kchh kchk kchs kckc kckk kcsa kcsb kcsc kcss khab khac khak khas khbc khbs khca khcb khcc khch khck khcs khhk khhs khka khkk khks khss kkaa kkac kkba kkbb kkbs kkcb kkch kkck kkcs kkha kkhb kkhh kkhk kkkk kksa kkss ksab ksac ksah ksak ksas ksba ksbc ksbh ksbs ksca kscb ksch ksck kscs ksha kshb kshk kshs kska kskb kskk ksks kssa ksss sa-c saab saac saah saak saas saba sabb sabc sabs saca sacc sack sacs saha sahk sahs saka sakb sakk saks sasa sasc sash sask sass sbaa sbac sbas sbbs sbca sbcc sbcs sbhc sbhk sbhs sbsa scaa scab scac scak scas scba sccc sccs sch- scha schh schs sck- scsa scsc scsh shab shac shah shak shas shbs shca shcc shha shhh shhs shsc skab skac skhs skss ssaa ssab ssac ssas ssca sscc sscs sshs sssa sssb sssc sssh ssss