a-a a-c aaa aac aak aar aas aau ac- aca acc ack acr acs acu aka akc akk akr aks aku ar- ara arc ark arr ars aru as- asa asc ask asr ass asu au- aua auc auk aur aus c-- caa cac cak car cas cau cca ccc cck ccr ccs ccu cka ckc cks cra crc crk crr crs cru csa csc csk csr css csu cua cuc cuk cur cus cuu ka- kaa kac kak kar kas kau kca kcc kck kcr kcs kcu kkc kkk kkr kks kku kra krc krk krr krs kru ksa ksc ksk ksr kss ksu kuc kuk kur kus kuu ra- raa rac rak rar ras rau rca rcc rcr rcs rcu rkc rkk rks rku rra rrc rrk rrr rrs rru rsa rsc rsk rsr rss rsu rua ruc ruk rur rus ruu saa sac sak sar sas sau sca scc sck scr scs scu sk- ska skc skk skr sks sku sr- sra src srk srr srs ss- ssa ssc ssk ssr sss ssu sua suc suk sur sus suu ua- uaa uac uak uar uas uau uca ucc uck ucr ucs ucu uka ukc ukk ukr uku ur- ura urc urk urr urs uru usa usc usk usr uss usu uua uuc uur uus uuu