a-a a-c aaa aac aaf aao aar aas aau ac- aca acc acf aco acr acs acu af- afa afc aff afo afr afs afu aoa aoc aof aoo aor aos aou ar- ara arc arf aro arr ars aru as- asa asc asf aso asr ass asu au- aua auc auf auo aur aus c-- caa cac caf cao car cas cau cca ccc ccf cco ccr ccs ccu cfa cfc cff cfo cfr cfs cfu co- coa coc cof coo cor cos cou cra crc crf cro crr crs cru csa csc csf cso csr css csu cua cuc cuf cuo cur cus cuu faa fac faf fao far fas fau fca fcc fcf fco fcr fcs fcu ffa ffc fff ffo ffr ffs ffu foa foc fof foo for fos fou fra frc frf fro frr frs fru fsa fsc fsf fso fsr fss fsu fua fuf fuo fur fus fuu oaa oac oaf oao oar oas oau oc- oca occ ocf oco ocr ocs ocu of- ofa ofc off ofo ofr ofs ofu oo- ooa ooc oof ooo oor oos or- ora orc orf oro orr ors oru os- osa osc osf oso osr oss osu ou- oua ouc ouf ouo our ous ra- raa rac raf rao rar ras rau rca rcc rcf rco rcr rcs rcu rfa rfc rff rfo rfr rfs rfu roa roc rof roo ror ros rou rra rrc rrf rrr rrs rru rsa rsc rsf rso rsr rss rsu rua ruc ruf ruo rur rus ruu saa sac saf sao sar sas sau sca scc scf sco scr scs scu sfa sfc sff sfo sfr sfs sfu soa soc sof soo sor sos sou sr- sra src srf sro srr srs ss- ssa ssc ssf sso ssr sss ssu sua suc suf suo sur sus suu ua- uaa uac uaf uao uar uas uau uca ucc ucf uco ucr ucs ucu ufa ufc uff ufo ufr ufs ufu uoa uoc uoo uor uos ur- ura urc urf uro urr urs uru usa usc usf uso usr uss usu uua uuc uur uus uuu