a-a a-t aaa aad aaf aan aas aat ad- ada add adf adn ads adt af- afa afd aff afn afs aft an- ana and anf ann ans ant as- asa asd asf asn ass ast at- ata atd atf atn ats att daa dad daf dan das dat dda ddd ddf ddn dds ddt dfa dfd dff dfn dfs dft dna dnd dnf dnn dns dnt dsa dsd dsf dsn dss dst dta dtd dtf dtn dts dtt faa fad faf fan fas fat fda fdd fdf fdn fds fdt ffa ffd fff ffn ffs fft fna fnd fnf fnn fns fnt fsa fsd fsf fsn fss fst fta ftd ftf ftn fts ftt naa nad naf nan nas nat nda ndd ndf ndn nds ndt nfa nfd nff nfn nfs nft nna nnf nnn nns nnt nsa nsd nsf nsn nss nst nta ntd ntf ntn nts ntt saa sad saf san sas sat sda sdd sdf sdn sds sdt sfa sfd sff sfn sfs sft sna snd snf snn sns snt ss- ssa ssd ssf ssn sss sst sta std stf stn sts stt taa tad taf tan tas tat tda tdd tdf tdn tds tdt tfa tfd tff tfn tfs tft tna tnd tnf tnn tns tnt tsa tsd tsf tsn tss tst tta ttd ttf ttn tts ttt