-er a-a a-b a-i a-t aaa aab aad aae aaf aag aai aao aar aat ab- aba abb abd abe abf abg abi abo abr abt ad- ada adb add ade adf adg adi ado adr adt aea aeb aed aee aef aeg aei aeo aer aet af- afa afb afd afe aff afg afi afo afr aft ag- aga agb agd age agf agg agi ago agr agt ai- aia aib aid aie aif aig aii aio air ait aoa aob aod aoe aof aog aoi aoo aor aot ar- ara arb ard are arf arg ari aro arr art at- ata atb atd ate atf atg ati ato atr att baa bab bad bae baf bag bai bao bar bat bba bbb bbd bbe bbf bbg bbi bbo bbr bbt bda bdb bdd bde bdf bdg bdi bdo bdr bdt be- bea beb bed bee bef beg bei beo ber bet bfa bfb bfd bfe bff bfg bfi bfo bfr bft bga bgb bgd bge bgf bgg bgi bgo bgr bgt bi- bia bib bid bie bif big bii bio bir bit boa bob bod boe bof bog boi boo bor bot bra brb brd bre brf brg bri bro brr brt bta btb btd bte btf btg bti bto btr btt daa dab dad dae daf dag dai dao dar dat dba dbb dbd dbe dbf dbg dbi dbo dbr dbt dda ddb ddd dde ddf ddg ddi ddo ddr ddt de- dea deb ded dee def deg dei deo der det dfa dfb dfd dfe dff dfg dfi dfo dfr dft dga dgd dge dgf dgg dgi dgr dgt di- dia dib did die dif dig dii dio dir dit doa dob dod doe dof dog doi doo dor dot dra drb drd dre drg dri dro drr drt dta dtb dtd dte dtf dtg dti dto dtr dtt eaa eab ead eae eaf eag eai eao ear eat eba ebb ebd ebe ebf ebg ebi ebo ebr ebt ed- eda edb edd ede edf edg edi edo edr edt eea eeb eed eee eef eeg eeo eer eet ef- efa efb efd efe eff efg efi efo efr eft ega egb egd ege egf egg egi ego egr egt eia eib eid eie eif eig eii eio eir eit eo- eoa eob eod eoe eof eog eoi eoo eor eot era erb erd ere erf erg eri ero err ert eta etb etd ete etf etg eti eto etr ett faa fab fad fae faf fag fai fao far fat fba fbb fbd fbe fbf fbg fbi fbo fbr fbt fda fdb fdd fde fdf fdg fdi fdo fdr fdt fea feb fed fee fef feg fei feo fer fet ffa ffd ffe fff ffg ffi ffo ffr fft fga fgb fgd fge fgf fgg fgi fgr fgt fia fib fid fie fif fig fii fir fit foa fob foe fof fog foi foo for fot fra frb frd fre frf frg fri fro frr frt fta ftb ftd fte ftf ftg fti fto ftr ftt g-d gaa gab gad gae gaf gag gai gao gar gat gba gbd gbe gbf gbg gbi gbo gbr gbt gda gdb gdd gde gdf gdi gdo gdr gdt ge- gea geb ged gee gef geg gei geo ger get gfa gfb gfd gfe gff gfi gfo gfr gft gga ggb ggd ggg ggi ggo ggr ggt gia gib gid gie gif gig gii gio gir git goa gob god goe gof gog goi goo gor got gra grb grd gre grf grg gri gro grr grt gta gtb gtd gte gtf gtg gti gto gtr gtt i-d i-f ia- iaa iab iad iae iaf iag iai iao iar iat iba ibb ibd ibe ibf ibg ibi ibo ibr ibt ida idb idd ide idf idg idi ido idr idt ie- iea ied iee ief ieg iei ier iet ifa ifb ifd ife iff ifg ifi ifo ifr ift iga igb igd ige igf igg igi igo igr igt iia iib iid iie iif iii iio iir iit io- ioa iob iod ioe iof iog ioi ioo ior iot ir- ira irb ird ire irf irg iri iro irr irt ita itb itd ite itf itg iti ito itt o-i oaa oab oad oae oaf oag oai oao oar oat ob- oba obb obd obe obf obg obi obo obr obt oda odb odd ode odf odg odi odo odr odt oea oeb oed oee oef oeg oei oeo oer oet of- ofa ofb ofd ofe off ofg ofi ofo ofr oft oga ogd oge ogf ogg ogi ogo ogt oia oib oid oie oif oii oio oir oit oo- ooa oob ood oof oog ooi ooo oor oot or- ora orb ord ore orf org ori oro orr ort ot- ota otb otd ote otf otg oti oto otr ott ra- raa rab rad rae raf rag rai rao rar rat rba rbb rbd rbe rbf rbg rbi rbo rbr rbt rda rdb rdd rde rdf rdg rdi rdo rdr rdt re- rea reb red ree ref reg rei reo rer ret rfa rfb rfd rfe rff rfg rfi rfo rfr rft rga rgb rgd rge rgf rgg rgi rgo rgr rgt ria rib rid rie rif rig rii rio rir rit roa rob rod roe rof rog roi roo ror rot rra rrb rrd rrf rrg rri rrr rrt rta rtb rtd rte rtf rtg rti rto rtr rtt taa tab tad tae taf tag tai tao tar tat tba tbb tbd tbe tbf tbg tbi tbo tbr tbt tda tdb tdd tde tdf tdg tdi tdo tdr tdt te- tea teb ted tee tef teg tei teo ter tet tfa tfb tfd tfe tff tfg tfi tfo tfr tft tga tgb tge tgf tgg tgi tgo tgr tgt tia tib tid tie tif tig tii tio tir tit to- toa tob tod toe tof tog toi too tor tot tra trb trd tre trf trg tri