-er a-a a-b a-i aaa aab aad aae aag aai aan aar aas ab- aba abb abd abe abg abi abn abr abs ad- ada adb add ade adg adi adn adr ads aea aeb aed aee aeg aei aen aer aes ag- aga agb agd age agg agi agn agr ags ai- aia aib aid aie aig aii ain air ais an- ana anb and ane ang ani ann anr ans ar- ara arb ard are arg ari arn arr ars as- asa asb asd ase asg asi asn asr ass baa bab bad bae bag bai ban bar bas bba bbb bbd bbe bbg bbi bbn bbr bbs bda bdb bdd bde bdg bdi bdr bds be- bea beb bed bee beg bei ben ber bes bga bgb bgd bge bgg bgi bgn bgr bgs bi- bia bib bid bie big bii bin bir bis bna bnb bnd bne bng bni bnn bnr bns bra brb brd bre brg bri brn brr brs bsa bsb bsd bse bsg bsi bsn bsr bss daa dab dad dae dag dai dan dar das dba dbb dbd dbe dbg dbi dbn dbr dbs dda ddb ddd dde ddg ddi ddn ddr dds de- dea deb ded dee deg dei den der des dga dgd dge dgg dgi dgn dgr dgs di- dia dib did die dig dii din dir dis dna dnb dnd dne dng dni dnn dnr dns dra drb drd dre drg dri drn drr drs dsa dsb dsd dse dsg dsi dsn dsr dss eaa eab ead eae eag eai ean ear eas eba ebb ebd ebe ebg ebi ebn ebr ebs ed- eda edb edd ede edg edi edn edr eds eea eeb eed eee eeg een eer ees ega egb egd ege egg egi egn egr egs eia eib eid eie eig eii ein eir eis en- ena enb end ene eng eni enn enr ens era erb erd ere erg eri ern err ers es- esa esb esd ese esg esi esn esr ess g-d gaa gab gad gae gag gai gan gar gas gba gbd gbe gbg gbi gbn gbr gbs gda gdb gdd gde gdi gdn gdr gds ge- gea geb ged gee geg gei gen ger ges gga ggb ggd ggg ggi ggn ggr ggs gia gib gid gie gig gii gin gir gis gna gnb gnd gne gni gnn gnr gns gra grb grd gre grg gri grn grr grs gsa gsb gsd gse gsg gsi gsn gsr gss i-d ia- iaa iab iad iae iag iai ian iar ias iba ibb ibd ibe ibg ibi ibn ibr ibs ida idb idd ide idg idi idn idr ids ie- iea ied iee ieg iei ien ier ies iga igb igd ige igg igi ign igr igs iia iib iid iie iii iin iir iis in- ina inb ind ine ing ini inn inr ins ir- ira irb ird ire irg iri irn irr irs is- isa isb isd ise isg isi isn isr iss n-i naa nab nad nae nag nai nan nar nas nba nbb nbd nbe nbg nbi nbn nbr nbs nda ndb ndd nde ndg ndi ndn ndr nds ne- nea neb ned nee neg nei nen ner nes nga ngb ngd nge ngg ngi ngn ngs nia nib nid nie nig nii nin nir nis nna nnb nne nng nni nnn nns nra nrb nrd nre nrg nri nrn nrr nrs nsa nsb nsd nse nsg nsi nsn nsr nss ra- raa rab rad rae rag rai ran rar ras rba rbb rbd rbe rbg rbi rbn rbr rbs rda rdb rdd rde rdg rdi rdn rdr rds re- rea reb red ree reg rei ren rer res rga rgb rgd rge rgg rgi rgn rgr rgs ria rib rid rie rig rii rin rir ris rna rnb rnd rng rni rnn rnr rns rra rrb rrd rrg rri rrn rrr rrs rsa rsb rsd rse rsg rsi rsn rsr rss saa sab sad sae sag sai san sar sas sba sbb sbd sbe sbg sbi sbn sbr sbs sda sdb sdd sde sdg sdi sdn sdr sds se- sea seb sed see seg sei sen ser ses sga sgb sgd sge sgg sgi sgn sgr sgs sia sib sid sie sig sii sin sir sis sna snb snd sne sng sni snn snr sns sr- sra srb srd sre srg sri srn srr srs ss- ssa ssb ssd sse ssg ssi ssn ssr sss