a-a a-c aaa aac aan aar aas aau ac- aca acc acn acr acs acu an- ana anc ann anr ans anu ar- ara arc arn arr ars aru as- asa asc asn asr ass asu au- aua auc aun aur aus c-- caa cac can car cas cau cca ccc ccn ccr ccs ccu cn- cna cnc cnn cnr cns cnu cra crc crn crr crs cru csa csc csn csr css csu cua cuc cun cur cus cuu naa nac nan nar nas nau nca ncc ncn ncr ncs ncu nna nnc nnn nns nnu nra nrc nrn nrr nrs nru nsa nsc nsn nsr nss nsu nua nuc nun nur nus nuu ra- raa rac ran rar ras rau rca rcc rcn rcr rcs rcu rna rnc rnn rnr rns rnu rra rrc rrn rrr rrs rru rsa rsc rsn rsr rss rsu rua ruc run rur rus ruu saa sac san sar sas sau sca scc scn scr scs scu sna snc snn snr sns snu sr- sra src srn srr srs ss- ssa ssc ssn ssr sss ssu sua suc sun sur sus suu ua- uaa uac uan uar uas uau uca ucc ucn ucr ucs ucu un- una unc unn unr uns unu ur- ura urc urn urr urs uru usa usc usn usr uss usu uua uuc uun uur uus uuu