a-a a-c aaa aac aad aaf aak aas aau ac- aca acc acd acf ack acs acu ad- ada adc add adf adk ads adu af- afa afc afd aff afk afs afu aka akc akd akk aks aku as- asa asc asd asf ask ass asu au- aua auc aud auf auk aus c-- caa cac cad caf cak cas cau cca ccc ccd ccf cck ccs ccu cda cdc cdd cdf cdk cds cdu cfa cfc cfd cff cfk cfs cfu cka ckc ckd cks csa csc csd csf csk css csu cua cuc cud cuf cuk cus cuu daa dac dad daf dak das dau dca dcc dcd dcf dck dcs dcu dda ddc ddd ddf ddk dds ddu dfa dfc dfd dff dfk dfs dfu dka dkc dkk dks dku dsa dsc dsd dsf dsk dss dsu dua duc dud duf duk dus faa fac fad faf fak fas fau fca fcc fcd fcf fck fcs fcu fda fdc fdd fdf fdk fds fdu ffa ffc ffd fff ffk ffs ffu fka fkc fkf fkk fsa fsc fsd fsf fsk fss fsu fua fud fuf fuk fus fuu ka- kaa kac kad kaf kak kas kau kca kcc kcd kck kcs kcu kda kdc kdf kdk kds kdu kfa kfc kfd kff kfs kfu kkc kkk kks kku ksa ksc ksd ksf ksk kss ksu kuc kud kuk kus kuu saa sac sad saf sak sas sau sca scc scd scf sck scs scu sda sdc sdd sdf sdk sds sdu sfa sfc sfd sff sfk sfs sfu sk- ska skc skd skf skk sks sku ss- ssa ssc ssd ssf ssk sss ssu sua suc sud suf suk sus suu ua- uaa uac uad uaf uak uas uau uca ucc ucd ucf uck ucs ucu uda udc udd udf udk uds udu ufa ufc ufd uff ufs ufu uka ukc ukf ukk uku usa usc usd usf usk uss usu uua uuc uus uuu