a-a a-c aaa aac aad aaf aan aau ac- aca acc acd acf acn acu ad- ada adc add adf adn adu af- afa afc afd aff afn afu an- ana anc and anf ann anu au- aua auc aud auf aun c-- caa cac cad caf can cau cca ccc ccd ccf ccn ccu cda cdc cdd cdf cdn cdu cfa cfc cfd cff cfn cfu cn- cna cnc cnd cnf cnn cnu cua cuc cud cuf cun cuu daa dac dad daf dan dau dca dcc dcd dcf dcn dcu dda ddc ddd ddf ddn ddu dfa dfc dfd dff dfn dfu dna dnc dnd dnf dnn dua duc dud duf dun faa fac fad faf fan fau fca fcc fcd fcf fcn fcu fda fdc fdd fdf fdn fdu ffa ffc ffd fff ffn ffu fna fnc fnd fnf fnn fnu fua fud fuf fun fuu naa nac nad naf nan nau nca ncc ncd ncf ncn ncu nda ndc ndd ndf ndn ndu nfa nfc nfd nff nfn nfu nna nnc nnf nnn nnu nua nuc nud nun nuu ua- uaa uac uad uaf uan uau uca ucc ucd ucf ucn ucu uda udc udd udf udn udu ufa ufc ufd uff ufn ufu un- una unc und unf unn unu uua uuc uun uuu