a-a a-b a-i aaa aab aad aaf aag aai aan aao aar aas ab- aba abb abd abf abg abi abn abo abr abs ad- ada adb add adf adg adi adn ado adr ads af- afa afb afd aff afg afi afn afo afr afs ag- aga agb agd agf agg agi agn ago agr ags ai- aia aib aid aif aig aii ain aio air ais an- ana anb and anf ang ani ann ano anr ans aoa aob aod aof aog aoi aon aoo aor aos ar- ara arb ard arf arg ari arn aro arr ars as- asa asb asd asf asg asi asn aso asr ass baa bab bad baf bag bai ban bao bar bas bba bbb bbd bbf bbg bbi bbn bbo bbr bbs bda bdb bdd bdf bdg bdi bdo bdr bds bfa bfb bfd bff bfg bfi bfn bfo bfr bfs bga bgb bgd bgf bgg bgi bgn bgo bgr bgs bi- bia bib bid bif big bii bin bio bir bis bna bnb bnd bnf bng bni bnn bno bnr bns boa bob bod bof bog boi bon boo bor bos bra brb brd brf brg bri brn bro brr brs bsa bsb bsd bsf bsg bsi bsn bso bsr bss daa dab dad daf dag dai dan dao dar das dba dbb dbd dbf dbg dbi dbn dbo dbr dbs dda ddb ddd ddf ddg ddi ddn ddo ddr dds dfa dfb dfd dff dfg dfi dfn dfo dfr dfs dga dgd dgf dgg dgi dgn dgr dgs di- dia dib did dif dig dii din dio dir dis dna dnb dnd dnf dng dni dnn dno dnr dns doa dob dod dof dog doi don doo dor dos dra drb drd drg dri drn dro drr drs dsa dsb dsd dsf dsg dsi dsn dso dsr dss faa fab fad faf fag fai fan fao far fas fba fbb fbd fbf fbg fbi fbn fbo fbr fbs fda fdb fdd fdf fdg fdi fdn fdo fdr fds ffa ffd fff ffg ffi ffn ffo ffr ffs fga fgb fgd fgf fgg fgi fgn fgr fgs fia fib fid fif fig fii fin fir fis fna fnb fnd fnf fng fni fnn fnr fns foa fob fof fog foi fon foo for fos fra frb frd frf frg fri frn fro frr frs fsa fsb fsd fsf fsg fsi fsn fso fsr fss g-d gaa gab gad gaf gag gai gan gao gar gas gba gbd gbf gbg gbi gbn gbo gbr gbs gda gdb gdd gdf gdi gdn gdo gdr gds gfa gfb gfd gff gfi gfo gfr gfs gga ggb ggd ggg ggi ggn ggo ggr ggs gia gib gid gif gig gii gin gio gir gis gna gnb gnd gnf gni gnn gno gnr gns goa gob god gof gog goi gon goo gor gos gra grb grd grf grg gri grn gro grr grs gsa gsb gsd gsf gsg gsi gsn gso gsr gss i-d i-f ia- iaa iab iad iaf iag iai ian iao iar ias iba ibb ibd ibf ibg ibi ibn ibo ibr ibs ida idb idd idf idg idi idn ido idr ids ifa ifb ifd iff ifg ifi ifn ifo ifr ifs iga igb igd igf igg igi ign igo igr igs iia iib iid iif iii iin iio iir iis in- ina inb ind inf ing ini inn ino inr ins io- ioa iob iod iof iog ioi ion ioo ior ios ir- ira irb ird irf irg iri irn iro irr irs is- isa isb isd isf isg isi isn iso isr iss n-i naa nab nad naf nag nai nan nao nar nas nba nbb nbd nbf nbg nbi nbn nbo nbr nbs nda ndb ndd ndf ndg ndi ndn ndo ndr nds nfa nfb nfd nff nfi nfn nfo nfr nfs nga ngb ngd ngf ngg ngi ngn ngo ngs nia nib nid nif nig nii nin nio nir nis nna nnb nnf nng nni nnn nno nns no- noa nob nod nof nog noi non noo nor nos nra nrb nrd nrf nrg nri nrn nro nrr nrs nsa nsb nsd nsf nsg nsi nsn nso nsr nss o-i oaa oab oad oaf oag oai oan oao oar oas ob- oba obb obd obf obg obi obn obo obr obs oda odb odd odf odg odi odn odo odr ods of- ofa ofb ofd off ofg ofi ofn ofo ofr ofs oga ogd ogf ogg ogi ogn ogo ogs oia oib oid oif oii oin oio oir ois on- ona onb ond onf ong oni onn ono onr ons oo- ooa oob ood oof oog ooi oon ooo oor oos or- ora orb ord orf org ori orn oro orr ors os- osa osb osd osf osg osi osn oso osr oss ra- raa rab rad raf rag rai ran rao rar ras rba rbb rbd rbf rbg rbi rbn rbo rbr rbs rda rdb rdd rdf rdg rdi rdn rdo rdr rds rfa rfb rfd rff rfg rfi rfn rfo rfr rfs rga rgb rgd rgf rgg rgi rgn rgo rgr rgs ria rib rid rif rig rii rin rio rir ris rna rnb rnd rng rni rnn rno rnr rns roa rob rod rof rog roi ron roo ror ros rra rrb rrd rrf rrg rri rrn rrr rrs rsa rsb rsd rsf rsg rsi rsn rso rsr rss saa sab sad saf sag sai san sao sar sas sba sbb sbd sbf sbg sbi sbn sbo sbr sbs sda sdb sdd sdf sdg sdi sdn sdo sdr sds sfa sfb sfd sff sfg sfi sfn sfo sfr sfs sga sgb sgd sgf sgg sgi sgn sgo sgr sgs sia sib sid sif sig sii sin sio sir sis sna snb snd snf sng sni snn sno snr sns soa sob sod sof sog soi son soo sor sos sr- sra srb srd srf srg sri srn sro srr srs ss- ssa ssb