a-a a-c aaa aac aaf aan aar aas aau ac- aca acc acf acn acr acs acu af- afa afc aff afn afr afs afu an- ana anc anf ann anr ans anu ar- ara arc arf arn arr ars aru as- asa asc asf asn asr ass asu au- aua auc auf aun aur aus c-- caa cac caf can car cas cau cca ccc ccf ccn ccr ccs ccu cfa cfc cff cfn cfr cfs cfu cn- cna cnc cnf cnn cnr cns cnu cra crc crf crn crr crs cru csa csc csf csn csr css csu cua cuc cuf cun cur cus cuu faa fac faf fan far fas fau fca fcc fcf fcn fcr fcs fcu ffa ffc fff ffn ffr ffs ffu fna fnc fnf fnn fnr fns fnu fra frc frf frn frr frs fru fsa fsc fsf fsn fsr fss fsu fua fuf fun fur fus fuu naa nac naf nan nar nas nau nca ncc ncf ncn ncr ncs ncu nfa nfc nff nfn nfr nfs nfu nna nnc nnf nnn nns nnu nra nrc nrf nrn nrr nrs nru nsa nsc nsf nsn nsr nss nsu nua nuc nun nur nus nuu ra- raa rac raf ran rar ras rau rca rcc rcf rcn rcr rcs rcu rfa rfc rff rfn rfr rfs rfu rna rnc rnn rnr rns rnu rra rrc rrf rrn rrr rrs rru rsa rsc rsf rsn rsr rss rsu rua ruc ruf run rur rus ruu saa sac saf san sar sas sau sca scc scf scn scr scs scu sfa sfc sff sfn sfr sfs sfu sna snc snf snn snr sns snu sr- sra src srf srn srr srs ss- ssa ssc ssf ssn ssr sss ssu sua suc suf sun sur sus suu ua- uaa uac uaf uan uar uas uau uca ucc ucf ucn ucr ucs ucu ufa ufc uff ufn ufr ufs ufu un- una unc unf unn unr uns unu ur- ura urc urf urn urr urs uru usa usc usf usn usr uss usu uua uuc uun uur uus uuu