a-a a-t aaa aad aaf aan aao aat ad- ada add adf adn ado adt af- afa afd aff afn afo aft an- ana and anf ann ano ant aoa aod aof aon aoo aot at- ata atd atf atn ato att daa dad daf dan dao dat dda ddd ddf ddn ddo ddt dfa dfd dff dfn dfo dft dna dnd dnf dnn dno dnt doa dod dof don doo dot dta dtd dtf dtn dto dtt faa fad faf fan fao fat fda fdd fdf fdn fdo fdt ffa ffd fff ffn ffo fft fna fnd fnf fnn fnt foa fof fon foo fot fta ftd ftf ftn fto ftt naa nad naf nan nao nat nda ndd ndf ndn ndo ndt nfa nfd nff nfn nfo nft nna nnf nnn nno nnt no- noa nod nof non noo not nta ntd ntf ntn nto ntt oaa oad oaf oan oao oat oda odd odf odn odo odt of- ofa ofd off ofn ofo oft on- ona ond onf onn ono ont oo- ooa ood oof oon ooo oot ot- ota otd otf otn oto ott taa tad taf tan tao tat tda tdd tdf tdn tdo tdt tfa tfd tff tfn tfo tft tna tnd tnf tnn tno tnt to- toa tod tof ton too tot tta ttd ttf ttn tto ttt