-al a-a a-b a-c aaa aab aac aak aal aas aau ab- aba abb abc abk abl abs abu ac- aca acb acc ack acl acs acu aka akb akc akk akl aks aku al- ala alb alc alk all als alu as- asa asb asc ask asl ass asu au- aua aub auc auk aul aus b-u baa bab bac bak bal bas bau bba bbb bbc bbk bbl bbs bbu bca bcb bcc bck bcl bcs bcu bka bkb bkc bkk bkl bks bla blb blc blk bll bls blu bsa bsb bsc bsk bsl bss bsu bua bub buc buk bul bus buu c-- caa cab cac cak cal cas cau cba cbb cbc cbk cbl cbs cbu cca ccb ccc cck ccl ccs ccu cka ckb ckc cks cl- cla clb clc clk cll cls clu csa csb csc csk csl css csu cua cub cuc cuk cul cus cuu ka- kaa kab kac kak kal kas kau kba kbb kbc kbk kbl kbs kbu kca kcb kcc kck kcl kcs kcu kkb kkc kkk kkl kks kku kl- kla klb klc kls klu ksa ksb ksc ksk ksl kss ksu kub kuc kuk kul kus kuu la- laa lab lac lak lal las lau lba lbb lbc lbk lbl lbs lbu lca lcb lcc lck lcl lcs lcu lka lkb lkl lks lla llb llc llk lll lls llu lsa lsb lsc lsk lsl lss lsu lua lub luc luk lul lus luu saa sab sac sak sal sas sau sba sbb sbc sbk sbl sbs sbu sca scb scc sck scl scs scu sk- ska skb skc skk skl sks sku sla slb slc slk sll sls slu ss- ssa ssb ssc ssk ssl sss ssu sua sub suc suk sul sus suu ua- uaa uab uac uak ual uas uau uba ubb ubc ubk ubl ubs ubu uca ucb ucc uck ucl ucs ucu uka ukb ukc ukk ukl uku ula ulb ulc ulk ull uls ulu usa usb usc usk usl uss usu uua uuc uus uuu

a-ak aaaa aaab aaac aaal aaas aaba aabb aabc aabl aaca aacb aacc aack aacl aacs aacu aaka aaku aala aalc aall aals aalu aasa aasc aass aasu aaus abaa abab abac abak abal abas abau abb- abba abbb abbs abca abcb abcc abcl abcs abla abls abs- absa absl abss absu abua abuk abul abus acaa acab acac acas acba acbl acca accc accs accu acks acla aclc acls aclu acsa acsc acsl acss acu- acul acus akaa akal akas akca akka akku aksa aksu akua alaa alac alak alal alas alau alb- alba albc albs albu alca alcc alcs alk- alka alkb alku all- alla alll alls allu alsa alsc alua aluk alus asaa asab asac asak asal asas asau asba asbu asc- asca ascb ascc ascl aska asks asla assa assc assk assl asss assu asub asus auaa auca auks aul- aula aull auls aulu ausa ausu baaa baak baal baas baba babb babs babu bac- baca bacc back bacs bak- baka bakl baks baku bala balc balk ball bals balu basa basc bask bass basu bau- bauk baul bbas bbau bbbb bbbs bblb bbls bcaa bcas bcbc bcbs bcca bccc bccl bccs bcsa bcsc bcsl bcss bcuc blaa blab blac blak blas blau blcu blkb blls blss blub blus bsaa bsac bsas bscs bslc bssc bual buba bubb bubs bubu buca bucc buck bucs bucu buka bukk buku bula bulb bulk bull buls bulu busa busc busk buss busu buus caaa caab caac caal caas caba cabs cabu cac- caca cacc cack caka cala calc calk call cals calu casa casb casc cask casl cass casu cauc cauk caul caus cbac cbal cbbc cbbs cbca cbcc cbcl cbcs cbcu cbka cbkl cblb cblc cbsa cbsc cbus ccaa ccab ccac ccas ccba ccbc ccca cccb cccc cccl cccs cccu ccla cclc ccls ccsa ccsl ccss ccuc ccus ckac ckbc ckck ckcl ckcs cksa cksb cksl clab clas clau clsa clsc club csaa csab csac csak csas cscb cscc cscl cscs cska csks csla cslu cssa csua csus cuau cub- cuba cubb cubs cuca cucc cuck cuk- cuka cula culb culc culk cull culs cusa cusb cusk cuss cusu kaaa kaab kaak kaal kaas kaba kabb kabc kabu kacb kacc kacl kacs kacu kaka kakc kakk kaks kaku kala kalb kalc kalk kall kals kalu kas- kasa kasb kasc kask kasl kass kasu kau- kaub kauc kauk kaul kaus kbaa kbab kbac kbak kbal kbas kbba kbbb kbbc kbbk kbbl kbbs kbbu kbca kbcb kbck kbcl kbcs kbcu kbkb kbkk kbkl kbla kblb kbll kbls kblu kbsa kbsb kbsk kbss kbsu kbua kbub kbuc kbuk kbul kbus kbuu kcaa kcab kcac kcal kcas kcau kcba kcbc kcbk kcbl kcbs kcbu kcca kccb kccc kcck kccl kccu kckc kckk kckl kcla kclc kclk kcll kcls kclu kcsa kcsb kcsc kcss kcsu kcua kcub kcuk kcul kkaa kkac kkal kkba kkbb kkbl kkbs kkcb kkck kkcl kkcs kkkk kklb kklc kkll kkls kksa kkss kksu kkua kkus kkuu klaa klab klac klak klal klas klbb klbc klbl klbs klbu klca klcb klcc klck klcl klcs klka klkc klkk klkl klks klla kllb kllc kllk klls klsa klsc klsu klub kluk kluu ksab ksac ksak ksal ksas ksau ksba ksbc ksbl ksbs ksca kscb ksck kscl kscs kscu kska kskb kskk ksks ksku ksla kslb kslc kslk ksll kslu kssa kssl ksss kssu ksua ksub ksuu kuac kuau kuba kubb kubc kubs kubu kuca kucb kucc kuka kukk kukl kuks kuku kula kulb kull kulu kusa kusb kusc kusu kuub kuuk kuul kuuu laaa laac laak laal laas laba labs labu laca lacc lack lacl lacs lacu laka laks lala lall lalu lasa lask lass lasu laub lauk laul laus lbcc lbsc lcac lcbc lcca lccc lccs lcls lcsc lkab lkal llbs llcc llcs llks lllc llll lsbu lscb lscs lsla lssa luas luau luba lubs luca luck lucs luka lula lull lulu lusa lusk luss