a-a a-b a-i a-t aaa aab aad aaf aai aan aao aar aas aat ab- aba abb abd abf abi abn abo abr abs abt ad- ada adb add adf adi adn ado adr ads adt af- afa afb afd aff afi afn afo afr afs aft ai- aia aib aid aif aii ain aio air ais ait an- ana anb and anf ani ann ano anr ans ant aoa aob aod aof aoi aon aoo aor aos aot ar- ara arb ard arf ari arn aro arr ars art as- asa asb asd asf asi asn aso asr ass ast at- ata atb atd atf ati atn ato atr ats att baa bab bad baf bai ban bao bar bas bat bba bbb bbd bbf bbi bbn bbo bbr bbs bbt bda bdb bdd bdf bdi bdo bdr bds bdt bfa bfb bfd bff bfi bfn bfo bfr bfs bft bi- bia bib bid bif bii bin bio bir bis bit bna bnb bnd bnf bni bnn bno bnr bns bnt boa bob bod bof boi bon boo bor bos bot bra brb brd brf bri brn bro brr brs brt bsa bsb bsd bsf bsi bsn bso bsr bss bst bta btb btd btf bti btn bto btr bts btt daa dab dad daf dai dan dao dar das dat dba dbb dbd dbf dbi dbn dbo dbr dbs dbt dda ddb ddd ddf ddi ddn ddo ddr dds ddt dfa dfb dfd dff dfi dfn dfo dfr dfs dft di- dia dib did dif dii din dio dir dis dit dna dnb dnd dnf dni dnn dno dnr dns dnt doa dob dod dof doi don doo dor dos dot dra drb drd dri drn dro drr drs drt dsa dsb dsd dsf dsi dsn dso dsr dss dst dta dtb dtd dtf dti dtn dto dtr dts dtt faa fab fad faf fai fan fao far fas fat fba fbb fbd fbf fbi fbn fbo fbr fbs fbt fda fdb fdd fdf fdi fdn fdo fdr fds fdt ffa ffd fff ffi ffn ffo ffr ffs fft fia fib fid fif fii fin fir fis fit fna fnb fnd fnf fni fnn fnr fns fnt foa fob fof foi fon foo for fos fot fra frb frd frf fri frn fro frr frs frt fsa fsb fsd fsf fsi fsn fso fsr fss fst fta ftb ftd ftf fti ftn fto ftr fts ftt i-d i-f ia- iaa iab iad iaf iai ian iao iar ias iat iba ibb ibd ibf ibi ibn ibo ibr ibs ibt ida idb idd idf idi idn ido idr ids idt ifa ifb ifd iff ifi ifn ifo ifr ifs ift iia iib iid iif iii iin iio iir iis iit in- ina inb ind inf ini inn ino inr ins int io- ioa iob iod iof ioi ion ioo ior ios iot ir- ira irb ird irf iri irn iro irr irs irt is- isa isb isd isf isi isn iso isr iss ist ita itb itd itf iti itn ito its itt n-i naa nab nad naf nai nan nao nar nas nat nba nbb nbd nbf nbi nbn nbo nbr nbs nbt nda ndb ndd ndf ndi ndn ndo ndr nds ndt nfa nfb nfd nff nfi nfn nfo nfr nfs nft nia nib nid nif nii nin nio nir nis nit nna nnb nnf nni nnn nno nns nnt no- noa nob nod nof noi non noo nor nos not nra nrb nrd nrf nri nrn nro nrr nrs nrt nsa nsb nsd nsf nsi nsn nso nsr nss nst nta ntb ntd ntf nti ntn nto ntr nts ntt o-i oaa oab oad oaf oai oan oao oar oas oat ob- oba obb obd obf obi obn obo obr obs obt oda odb odd odf odi odn odo odr ods odt of- ofa ofb ofd off ofi ofn ofo ofr ofs oft oia oib oid oif oii oin oio oir ois oit on- ona onb ond onf oni onn ono onr ons ont oo- ooa oob ood oof ooi oon ooo oor oos oot or- ora orb ord orf ori orn oro orr ors ort os- osa osb osd osf osi osn oso osr oss ost ot- ota otb otd otf oti otn oto otr ots ott ra- raa rab rad raf rai ran rao rar ras rat rba rbb rbd rbf rbi rbn rbo rbr rbs rbt rda rdb rdd rdf rdi rdn rdo rdr rds rdt rfa rfb rfd rff rfi rfn rfo rfr rfs rft ria rib rid rif rii rin rio rir ris rit rna rnb rnd rni rnn rno rnr rns rnt roa rob rod rof roi ron roo ror ros rot rra rrb rrd rrf rri rrn rrr rrs rrt rsa rsb rsd rsf rsi rsn rso rsr rss rst rta rtb rtd rtf rti rtn rto rtr rts rtt saa sab sad saf sai san sao sar sas sat sba sbb sbd sbf sbi sbn sbo sbr sbs sbt sda sdb sdd sdf sdi sdn sdo sdr sds sdt sfa sfb sfd sff sfi sfn sfo sfr sfs sft sia sib sid sif sii sin sio sir sis sit sna snb snd snf sni snn sno snr sns snt soa sob sod sof soi son soo sor sos sot sr- sra srb srd srf sri srn sro srr srs srt ss- ssa ssb ssd ssf ssi ssn sso ssr sss sst sta stb std stf sti stn sto str sts stt taa tab tad taf tai tan tao tar tas tat tba tbb tbd tbf tbi tbn tbo tbr tbs tbt tda tdb tdd tdf tdi tdn tdo tdr tds tdt tfa tfb tfd tff tfi tfn tfo tfr tfs tft tia tib tid tif tii tin tio tir tis tit tna tnb tnd tnf tni tnn tno tnr tns tnt to- toa tob tod tof toi ton too tor tos tot tra trb trd trf tri trn