a-a a-b a-c a-t aaa aab aac aak aao aas aat aau ab- aba abb abc abk abo abs abt abu ac- aca acb acc ack aco acs act acu aka akb akc akk ako aks aku aoa aob aoc aok aoo aos aot aou as- asa asb asc ask aso ass ast asu at- ata atb atc ato ats att atu au- aua aub auc auk auo aus aut b-u baa bab bac bak bao bas bat bau bba bbb bbc bbk bbo bbs bbt bbu bca bcb bcc bck bco bcs bct bcu bka bkb bkc bkk bko bks bkt boa bob boc bok boo bos bot bou bsa bsb bsc bsk bso bss bst bsu bta btb btc btk bto bts btt btu bua bub buc buk buo bus but buu c-- caa cab cac cak cao cas cat cau cba cbb cbc cbk cbo cbs cbt cbu cca ccb ccc cck cco ccs cct ccu cka ckb ckc cko cks ckt co- coa cob coc cok coo cos cot cou csa csb csc csk cso css cst csu cta ctb ctc ctk cto cts ctt ctu cua cub cuc cuk cuo cus cut cuu k-t ka- kaa kab kac kak kao kas kat kau kba kbb kbc kbk kbo kbs kbu kca kcb kcc kck kcs kct kcu kkb kkc kkk kks kkt kku koa kob koc kok koo kos kot kou ksa ksb ksc ksk kso kss kst ksu kta ktb ktc ktk kto kts ktt ktu kub kuc kuk kus kut kuu oaa oab oac oak oao oas oat oau ob- oba obb obc obk obo obs obt obu oc- oca ocb occ ock oco ocs oct ocu oka okb okc okk oko oks oku oo- ooa oob ooc ook ooo oos oot os- osa osb osc osk oso oss ost osu ot- ota otb otc otk oto ots ott otu ou- oua ouc ouk ouo ous out saa sab sac sak sao sas sat sau sba sbb sbc sbk sbo sbs sbt sbu sca scb scc sck sco scs sct scu sk- ska skb skc skk sko sks skt sku soa sob soc sok soo sos sot sou ss- ssa ssb ssc ssk sso sss sst ssu sta stb stc stk sto sts stt stu sua sub suc suk suo sus sut suu taa tab tac tak tao tas tat tau tba tbb tbc tbk tbo tbs tbt tbu tca tcb tcc tck tco tcs tct tcu tka tkb tkc tkk tko tks tkt to- toa tob toc tok too tos tot tou tsa tsb tsc tsk tso tss tst tsu tta ttb ttc ttk tto tts ttt ttu tua tub tuc tuk tuo tus tut tuu ua- uaa uab uac uak uao uas uat uau uba ubb ubc ubk ubo ubs ubt ubu uca ucb ucc uck uco ucs uct ucu uka ukb ukc ukk uku uoa uob uoc uok uoo uos uot usa usb usc usk uso uss ust usu uta utb utc utk uto uts utt utu uua uuc uus uut uuu

-ous a-ak a-ok aaaa aaab aaac aaas aaba aabb aabc aabt aaca aacb aacc aack aaco aacs aact aacu aaka aaku aaoo aasa aasc aass aast aasu aata aatc aatk aatt aaus abaa abab abac abak abas abat abau abb- abba abbb abbo abbs abbt abca abcb abcc abcs abct aboa abob abok aboo abos abot abou abs- absa abss absu abta abts abtu abua abuk abus abut ac-t acaa acab acac acas acat acba acca accc acco accs acct accu acks acoa acos acot acou acsa acsc acss acst acta actc acto acts actt actu acu- acuo acus acut akaa akao akas akca akka akko akku akok akos akot aksa akst aksu akua aoba aoca aocs aoks aoss aotc aous aout asaa asab asac asak asao asas asat asau asba asbo asbu asc- asca ascb ascc asco asct aska asko asks askt asob asoc asok asos asot asou assa assc assk asso asss asst assu asta astb astc asto asts asub asus at-t ataa atab atac atak atas atat atbs atca atcc atck atco atcs atka atkt atob atoc atok atos atot atsb atsc atst atta atto atts attu atua atub atuc atuk atus auaa auca auct auks ausa aust ausu aut- auto auts baaa baak baas baat baba babb babo babs babu bac- baca bacc back baco bacs bact bak- baka bako baks bakt baku baos basa basc bask baso bass bast basu bata batc bato bats batt batu bau- bauk bbas bbau bbbb bbbs bcaa bcas bcat bcbc bcbs bcca bccc bccs bcos bcsa bcsc bcss bctc bcts bcuc boab boac boak boas boat boba bobb bobo bobs bobu boca bock boco bocs bocu boka boko boks boku boob booc book boos boot bosa bosc bosk boso boss bost bosu bota botb boto bots bott boua bouk bous bout bsaa bsac bsas bsat bscs bskt bsos bssc bsts btaa btcc btcs btob btss bttb btus buat buba bubb bubo bubs bubu buca bucc buck buco bucs bucu buka bukk buko buku busa busc busk buss bust busu but- buta buto buts butt buus c-bo caaa caab caac caas caat caba cabo cabs cabu cac- caca cacc cack caco caka caos casa casb casc cask caso cass cast casu cat- cata catb catc cato cats catt catu cauc cauk cauo caus caut cbac cbat cbbc cbbs cbca cbcc cbcs cbct cbcu cbka cbko cbot cbsa cbsc cbta cbtc cbus ccaa ccab ccac ccas ccat ccba ccbc ccca cccb cccc cccs cccu ccob ccoc ccsa ccss ccst cctb cctc cctt ccuc ccus ccut ckac ckat ckbc ckck ckco ckcs ckoa ckob ckoc ckoo ckos ckot cksa cksb ckso ckst cktb ckts coak coas coat coba cobb cobo cobs cobu coca cock coco coct cocu cok- coka coko coob cook coos coot cosa cosc coso coss cost cota cotb cotc coto cots cott cotu coua coub couk cous cout csaa csab csac csak csao csas csat cscb cscc