a-a a-c aaa aac aad aaf aar aau ac- aca acc acd acf acr acu ad- ada adc add adf adr adu af- afa afc afd aff afr afu ar- ara arc ard arf arr aru au- aua auc aud auf aur c-- caa cac cad caf car cau cca ccc ccd ccf ccr ccu cda cdc cdd cdf cdr cdu cfa cfc cfd cff cfr cfu cra crc crd crf crr cru cua cuc cud cuf cur cuu daa dac dad daf dar dau dca dcc dcd dcf dcr dcu dda ddc ddd ddf ddr ddu dfa dfc dfd dff dfr dfu dra drc drd drr dru dua duc dud duf dur faa fac fad faf far fau fca fcc fcd fcf fcr fcu fda fdc fdd fdf fdr fdu ffa ffc ffd fff ffr ffu fra frc frd frf frr fru fua fud fuf fur fuu ra- raa rac rad raf rar rau rca rcc rcd rcf rcr rcu rda rdc rdd rdf rdr rdu rfa rfc rfd rff rfr rfu rra rrc rrd rrf rrr rru rua ruc rud ruf rur ruu ua- uaa uac uad uaf uar uau uca ucc ucd ucf ucr ucu uda udc udd udf udr udu ufa ufc ufd uff ufr ufu ur- ura urc urd urf urr uru uua uuc uur uuu