-er a-a a-b a-i aaa aab aad aae aaf aag aai aan aar ab- aba abb abd abe abf abg abi abn abr ad- ada adb add ade adf adg adi adn adr aea aeb aed aee aef aeg aei aen aer af- afa afb afd afe aff afg afi afn afr ag- aga agb agd age agf agg agi agn agr ai- aia aib aid aie aif aig aii ain air an- ana anb and ane anf ang ani ann anr ar- ara arb ard are arf arg ari arn arr baa bab bad bae baf bag bai ban bar bba bbb bbd bbe bbf bbg bbi bbn bbr bda bdb bdd bde bdf bdg bdi bdr be- bea beb bed bee bef beg bei ben ber bfa bfb bfd bfe bff bfg bfi bfn bfr bga bgb bgd bge bgf bgg bgi bgn bgr bi- bia bib bid bie bif big bii bin bir bna bnb bnd bne bnf bng bni bnn bnr bra brb brd bre brf brg bri brn brr daa dab dad dae daf dag dai dan dar dba dbb dbd dbe dbf dbg dbi dbn dbr dda ddb ddd dde ddf ddg ddi ddn ddr de- dea deb ded dee def deg dei den der dfa dfb dfd dfe dff dfg dfi dfn dfr dga dgd dge dgf dgg dgi dgn dgr di- dia dib did die dif dig dii din dir dna dnb dnd dne dnf dng dni dnn dnr dra drb drd dre drg dri drn drr eaa eab ead eae eaf eag eai ean ear eba ebb ebd ebe ebf ebg ebi ebn ebr ed- eda edb edd ede edf edg edi edn edr eea eeb eed eee eef eeg een eer ef- efa efb efd efe eff efg efi efr ega egb egd ege egf egg egi egn egr eia eib eid eie eif eig eii ein eir en- ena enb end ene enf eng eni enn enr era erb erd ere erf erg eri ern err faa fab fad fae faf fag fai fan far fba fbb fbd fbe fbf fbg fbi fbn fbr fda fdb fdd fde fdf fdg fdi fdn fdr fea feb fed fee fef feg fei fen fer ffa ffd ffe fff ffg ffi ffn ffr fga fgb fgd fge fgf fgg fgi fgn fgr fia fib fid fie fif fig fii fin fir fna fnb fnd fne fnf fng fni fnn fnr fra frb frd fre frf frg fri frn frr g-d gaa gab gad gae gaf gag gai gan gar gba gbd gbe gbf gbg gbi gbn gbr gda gdb gdd gde gdf gdi gdn gdr ge- gea geb ged gee gef geg gei gen ger gfa gfb gfd gfe gff gfi gfr gga ggb ggd ggg ggi ggn ggr gia gib gid gie gif gig gii gin gir gna gnb gnd gne gnf gni gnn gnr gra grb grd gre grf grg gri grn grr i-d i-f ia- iaa iab iad iae iaf iag iai ian iar iba ibb ibd ibe ibf ibg ibi ibn ibr ida idb idd ide idf idg idi idn idr ie- iea ied iee ief ieg iei ien ier ifa ifb ifd ife iff ifg ifi ifn ifr iga igb igd ige igf igg igi ign igr iia iib iid iie iif iii iin iir in- ina inb ind ine inf ing ini inn inr ir- ira irb ird ire irf irg iri irn irr n-i naa nab nad nae naf nag nai nan nar nba nbb nbd nbe nbf nbg nbi nbn nbr nda ndb ndd nde ndf ndg ndi ndn ndr ne- nea neb ned nee nef neg nei nen ner nfa nfb nfd nfe nff nfi nfn nfr nga ngb ngd nge ngf ngg ngi ngn nia nib nid nie nif nig nii nin nir nna nnb nne nnf nng nni nnn nra nrb nrd nre nrf nrg nri nrn nrr ra- raa rab rad rae raf rag rai ran rar rba rbb rbd rbe rbf rbg rbi rbn rbr rda rdb rdd rde rdf rdg rdi rdn rdr re- rea reb red ree ref reg rei ren rer rfa rfb rfd rfe rff rfg rfi rfn rfr rga rgb rgd rge rgf rgg rgi rgn rgr ria rib rid rie rif rig rii rin rir rna rnb rnd rng rni rnn rnr rra rrb rrd rrf rrg rri rrn rrr