-er a-a a-b a-i a-t aaa aab aad aae aag aai aan aar aat ab- aba abb abd abe abg abi abn abr abt ad- ada adb add ade adg adi adn adr adt aea aeb aed aee aeg aei aen aer aet ag- aga agb agd age agg agi agn agr agt ai- aia aib aid aie aig aii ain air ait an- ana anb and ane ang ani ann anr ant ar- ara arb ard are arg ari arn arr art at- ata atb atd ate atg ati atn atr att baa bab bad bae bag bai ban bar bat bba bbb bbd bbe bbg bbi bbn bbr bbt bda bdb bdd bde bdg bdi bdr bdt be- bea beb bed bee beg bei ben ber bet bga bgb bgd bge bgg bgi bgn bgr bgt bi- bia bib bid bie big bii bin bir bit bna bnb bnd bne bng bni bnn bnr bnt bra brb brd bre brg bri brn brr brt bta btb btd bte btg bti btn btr btt daa dab dad dae dag dai dan dar dat dba dbb dbd dbe dbg dbi dbn dbr dbt dda ddb ddd dde ddg ddi ddn ddr ddt de- dea deb ded dee deg dei den der det dga dgd dge dgg dgi dgn dgr dgt di- dia dib did die dig dii din dir dit dna dnb dnd dne dng dni dnn dnr dnt dra drb drd dre drg dri drn drr drt dta dtb dtd dte dtg dti dtn dtr dtt eaa eab ead eae eag eai ean ear eat eba ebb ebd ebe ebg ebi ebn ebr ebt ed- eda edb edd ede edg edi edn edr edt eea eeb eed eee eeg een eer eet ega egb egd ege egg egi egn egr egt eia eib eid eie eig eii ein eir eit en- ena enb end ene eng eni enn enr ent era erb erd ere erg eri ern err ert eta etb etd ete etg eti etn etr ett g-d gaa gab gad gae gag gai gan gar gat gba gbd gbe gbg gbi gbn gbr gbt gda gdb gdd gde gdi gdn gdr gdt ge- gea geb ged gee geg gei gen ger get gga ggb ggd ggg ggi ggn ggr ggt gia gib gid gie gig gii gin gir git gna gnb gnd gne gni gnn gnr gnt gra grb grd gre grg gri grn grr grt gta gtb gtd gte gtg gti gtn gtr gtt i-d ia- iaa iab iad iae iag iai ian iar iat iba ibb ibd ibe ibg ibi ibn ibr ibt ida idb idd ide idg idi idn idr idt ie- iea ied iee ieg iei ien ier iet iga igb igd ige igg igi ign igr igt iia iib iid iie iii iin iir iit in- ina inb ind ine ing ini inn inr int ir- ira irb ird ire irg iri irn irr irt ita itb itd ite itg iti itn itt n-i naa nab nad nae nag nai nan nar nat nba nbb nbd nbe nbg nbi nbn nbr nbt nda ndb ndd nde ndg ndi ndn ndr ndt ne- nea neb ned nee neg nei nen ner net nga ngb ngd nge ngg ngi ngn ngt nia nib nid nie nig nii nin nir nit nna nnb nne nng nni nnn nnt nra nrb nrd nre nrg nri nrn nrr nrt nta ntb ntd nte ntg nti ntn ntr ntt ra- raa rab rad rae rag rai ran rar rat rba rbb rbd rbe rbg rbi rbn rbr rbt rda rdb rdd rde rdg rdi rdn rdr rdt re- rea reb red ree reg rei ren rer ret rga rgb rgd rge rgg rgi rgn rgr rgt ria rib rid rie rig rii rin rir rit rna rnb rnd rng rni rnn rnr rnt rra rrb rrd rrg rri rrn rrr rrt rta rtb rtd rte rtg rti rtn rtr rtt taa tab tad tae tag tai tan tar tat tba tbb tbd tbe tbg tbi tbn tbr tbt tda tdb tdd tde tdg tdi tdn tdr tdt te- tea teb ted tee teg tei ten ter tet tga tgb tge tgg tgi tgn tgr tgt tia tib tid tie tig tii tin tir tit tna tnb tnd tne tng tni tnn tnr tnt tra trb trd tre trg tri trn trr trt tta ttb ttd tte ttg tti ttn ttr ttt