a-ak a-ok aaaa aaab aaac aaal aaas aaba aabb aabc aabl aaca aacb aacc aack aacl aaco aacs aaka aala aalc aall aalo aals aaoo aasa aasc aass abaa abab abac abak abal abas abb- abba abbb abbo abbs abca abcb abcc abcl abcs abla ablo abls aboa abob abok abol aboo abos abs- absa absl abss acaa acab acac acas acba acbl acca accc acco accs acks acla aclc acls acoa acol acos acsa acsc acsl acss akaa akal akao akas akca akka akko aklo akok akos aksa alaa alac alak alal alao alas alb- alba albc albo albs alca alcc alco alcs alk- alka alkb alko all- alla alll allo alls aloa aloc alok alol aloo alos alsa alsc also aoba aoca aocs aoks aola aoss asaa asab asac asak asal asao asas asba asbo asc- asca ascb ascc ascl asco aska asko asks asla aslo asob asoc asok asos assa assc assk assl asso asss baaa baak baal baas baba babb babo babs bac- baca bacc back baco bacs bak- baka bakl bako baks bala balc balk ball balo bals baol baos basa basc bask baso bass bbas bbbb bbbs bblb bbls bcaa bcas bcbc bcbs bcca bccc bccl bccs bcos bcsa bcsc bcsl bcss blaa blab blac blak blas blkb blls blob bloc blok bloo blss boab boac boak boal boas boba bobb bobo bobs boca bock boco bocs boka boko boks bola bolk boll bolo bols boob booc book bool boos bosa bosc bosk boso boss bsaa bsac bsas bscs bslc bsos bssc c-bo caaa caab caac caal caas caba cabo cabs cac- caca cacc cack caco caka cala calc calk call calo cals caol caos casa casb casc cask casl caso cass cbac cbal cbbc cbbs cbca cbcc cbcl cbcs cbka cbkl cbko cblb cblc cbol cbsa cbsc ccaa ccab ccac ccas ccba ccbc ccca cccb cccc cccl cccs ccla cclc ccls ccob ccoc ccsa ccsl ccss ckac ckbc ckck ckcl ckco ckcs ckoa ckob ckoc ckoo ckos cksa cksb cksl ckso clab clas clob clok cloo clos clsa clsc coak coal coas coba cobb cobo cobs coca cock coco cok- coka coko col- cola colb colk coll colo cols coob cook cool coos cosa cosc cosl coso coss csaa csab csac csak csao csas cscb cscc cscl csco cscs cska csks csla csob csos cssa k-lo k-os kaaa kaab kaak kaal kaas kaba kabb kabc kabo kacb kacc kacl kaco kacs kaka kakc kakk kako kaks kala kalb kalc kalk kall kalo kals kaoa kaoc kaok kaol kaos kas- kasa kasb kasc kask kasl kaso kass kbaa kbab kbac kbak kbal kbas kbba kbbb kbbc kbbk kbbl kbbo kbbs kbca kbcb kbck kbcl kbco kbcs kbkb kbkk kbkl kbko kbla kblb kbll kblo kbls kboa kbob kboc kbok kboo kbos kbsa kbsb kbsk kbso kbss kcaa kcab kcac kcal kcas kcba kcbc kcbk kcbl kcbs kcca kccb kccc kcck kccl kckc kckk kckl kcko kcla kclc kclk kcll kcls kcob kcol kcos kcsa kcsb kcsc kcss kkaa kkac kkal kkba kkbb kkbl kkbo kkbs kkcb kkck kkcl kkco kkcs kkkk kklb kklc kkll kklo kkls kkoa kkob kkol kkoo kksa kkss klaa klab klac klak klal klas klbb klbc klbl klbs klca klcb klcc klck klcl klcs klka klkc klkk klkl klko klks klla kllb kllc kllk klls kloa klob kloc klok klol kloo klos klsa klsc koab koac koak koal koas koba kobb kobc kobk kobo kobs koca kocb kock kocs koka kokb kokc kokk koko koks kola kolb kolc kolk koll kolo kols koob kooc kook kool kooo koos kos- kosa kosb kosc koso koss ksab ksac ksak ksal ksas ksba ksbc ksbl ksbs ksca kscb ksck kscl ksco kscs kska kskb kskk ksko ksks ksla kslb kslc kslk ksll kslo ksob ksoc ksok ksol ksoo ksos kssa kssl ksso ksss laaa laac laak laal laas laba labo labs laca lacc lack lacl laco lacs laka laks lala lall lalo laos lasa lask laso lass lbcc lbos lbsc lcac lcbc lcca lccc lccs lcls lcsc lkab lkal llao llbs llcc llcs llks lllc llll lloa lloc lloo loac loas lob- loba lobb lobo lobs loca locc lock loco locs loka lokk loko lola loll lolo lols loob looc look lool loos losa losc loso loss lscb lsco lscs lsla lssa lsso oaks oall oasc oasl oass obak obal obas obba obbo obkb obla obls obok obol obos obss ocab ocac ocak ocal ocas ocbc occa occc ocks oclc ocos ocsa okak okas okka okko okla oklo okok okol oksa okso olac olas olba olbo olca olcc olka olla ollo olos ooaa ooak ooba oola oolo oooo ooos oosa osak osas osba osca oscc oscl osco osla oslo osoo osos ossa ossb osso s-os sa-c saab saac saak saal saas saba sabb sabc sabo sabs saca sacc sack saco sacs saka sakb sakk sako saks sala salc salk sall salo sals saol saos sasa sasc sask sasl saso sass sbaa sbac sbas sbbs sbca sbcc sbcs sbsa scaa scab scac scak scal scas scba sccc sccl sccs sck- sckl scl- sclc sclk scls scob scok scol scoo scsa scsc scsl scso skab skac skal skol skss slaa slab slac slak slas slcc slob sloc sloo slos slsa slsc soak soal soas soba sobo sobs soca sock socl soco socs soka sokk soko sola solk soll solo sols sook sool soos sosa soso soss ssaa ssab ssac ssao ssas ssca sscc sscs ssla sslc ssoc sssa sssb sssc ssss