a-a aaa aad aaf aan aao aar ad- ada add adf adn ado adr af- afa afd aff afn afo afr an- ana and anf ann ano anr aoa aod aof aon aoo aor ar- ara ard arf arn aro arr daa dad daf dan dao dar dda ddd ddf ddn ddo ddr dfa dfd dff dfn dfo dfr dna dnd dnf dnn dno dnr doa dod dof don doo dor dra drd drn dro drr faa fad faf fan fao far fda fdd fdf fdn fdo fdr ffa ffd fff ffn ffo ffr fna fnd fnf fnn fnr foa fof fon foo for fra frd frf frn fro frr naa nad naf nan nao nar nda ndd ndf ndn ndo ndr nfa nfd nff nfn nfo nfr nna nnf nnn nno no- noa nod nof non noo nor nra nrd nrf nrn nro nrr oaa oad oaf oan oao oar oda odd odf odn odo odr of- ofa ofd off ofn ofo ofr on- ona ond onf onn ono onr oo- ooa ood oof oon ooo oor or- ora ord orf orn oro orr ra- raa rad raf ran rao rar rda rdd rdf rdn rdo rdr rfa rfd rff rfn rfo rfr rna rnd rnn rno rnr roa rod rof ron roo ror rra rrd rrf rrn rrr