a-a a-b a-i aaa aab aad aaf aag aai aan aar ab- aba abb abd abf abg abi abn abr ad- ada adb add adf adg adi adn adr af- afa afb afd aff afg afi afn afr ag- aga agb agd agf agg agi agn agr ai- aia aib aid aif aig aii ain air an- ana anb and anf ang ani ann anr ar- ara arb ard arf arg ari arn arr baa bab bad baf bag bai ban bar bba bbb bbd bbf bbg bbi bbn bbr bda bdb bdd bdf bdg bdi bdr bfa bfb bfd bff bfg bfi bfn bfr bga bgb bgd bgf bgg bgi bgn bgr bi- bia bib bid bif big bii bin bir bna bnb bnd bnf bng bni bnn bnr bra brb brd brf brg bri brn brr daa dab dad daf dag dai dan dar dba dbb dbd dbf dbg dbi dbn dbr dda ddb ddd ddf ddg ddi ddn ddr dfa dfb dfd dff dfg dfi dfn dfr dga dgd dgf dgg dgi dgn dgr di- dia dib did dif dig dii din dir dna dnb dnd dnf dng dni dnn dnr dra drb drd drg dri drn drr faa fab fad faf fag fai fan far fba fbb fbd fbf fbg fbi fbn fbr fda fdb fdd fdf fdg fdi fdn fdr ffa ffd fff ffg ffi ffn ffr fga fgb fgd fgf fgg fgi fgn fgr fia fib fid fif fig fii fin fir fna fnb fnd fnf fng fni fnn fnr fra frb frd frf frg fri frn frr g-d gaa gab gad gaf gag gai gan gar gba gbd gbf gbg gbi gbn gbr gda gdb gdd gdf gdi gdn gdr gfa gfb gfd gff gfi gfr gga ggb ggd ggg ggi ggn ggr gia gib gid gif gig gii gin gir gna gnb gnd gnf gni gnn gnr gra grb grd grf grg gri grn grr i-d i-f ia- iaa iab iad iaf iag iai ian iar iba ibb ibd ibf ibg ibi ibn ibr ida idb idd idf idg idi idn idr ifa ifb ifd iff ifg ifi ifn ifr iga igb igd igf igg igi ign igr iia iib iid iif iii iin iir in- ina inb ind inf ing ini inn inr ir- ira irb ird irf irg iri irn irr n-i naa nab nad naf nag nai nan nar nba nbb nbd nbf nbg nbi nbn nbr nda ndb ndd ndf ndg ndi ndn ndr nfa nfb nfd nff nfi nfn nfr nga ngb ngd ngf ngg ngi ngn nia nib nid nif nig nii nin nir nna nnb nnf nng nni nnn nra nrb nrd nrf nrg nri nrn nrr ra- raa rab rad raf rag rai ran rar rba rbb rbd rbf rbg rbi rbn rbr rda rdb rdd rdf rdg rdi rdn rdr rfa rfb rfd rff rfg rfi rfn rfr rga rgb rgd rgf rgg rgi rgn rgr ria rib rid rif rig rii rin rir rna rnb rnd rng rni rnn rnr rra rrb rrd rrf rrg rri rrn rrr