-er a-a a-b a-i a-t aaa aab aad aae aaf aag aai aar aas aat ab- aba abb abd abe abf abg abi abr abs abt ad- ada adb add ade adf adg adi adr ads adt aea aeb aed aee aef aeg aei aer aes aet af- afa afb afd afe aff afg afi afr afs aft ag- aga agb agd age agf agg agi agr ags agt ai- aia aib aid aie aif aig aii air ais ait ar- ara arb ard are arf arg ari arr ars art as- asa asb asd ase asf asg asi asr ass ast at- ata atb atd ate atf atg ati atr ats att baa bab bad bae baf bag bai bar bas bat bba bbb bbd bbe bbf bbg bbi bbr bbs bbt bda bdb bdd bde bdf bdg bdi bdr bds bdt be- bea beb bed bee bef beg bei ber bes bet bfa bfb bfd bfe bff bfg bfi bfr bfs bft bga bgb bgd bge bgf bgg bgi bgr bgs bgt bi- bia bib bid bie bif big bii bir bis bit bra brb brd bre brf brg bri brr brs brt bsa bsb bsd bse bsf bsg bsi bsr bss bst bta btb btd bte btf btg bti btr bts btt daa dab dad dae daf dag dai dar das dat dba dbb dbd dbe dbf dbg dbi dbr dbs dbt dda ddb ddd dde ddf ddg ddi ddr dds ddt de- dea deb ded dee def deg dei der des det dfa dfb dfd dfe dff dfg dfi dfr dfs dft dga dgd dge dgf dgg dgi dgr dgs dgt di- dia dib did die dif dig dii dir dis dit dra drb drd dre drg dri drr drs drt dsa dsb dsd dse dsf dsg dsi dsr dss dst dta dtb dtd dte dtf dtg dti dtr dts dtt eaa eab ead eae eaf eag eai ear eas eat eba ebb ebd ebe ebf ebg ebi ebr ebs ebt ed- eda edb edd ede edf edg edi edr eds edt eea eeb eed eee eef eeg eer ees eet ef- efa efb efd efe eff efg efi efr efs eft ega egb egd ege egf egg egi egr egs egt eia eib eid eie eif eig eii eir eis eit era erb erd ere erf erg eri err ers ert es- esa esb esd ese esf esg esi esr ess est eta etb etd ete etf etg eti etr ets ett faa fab fad fae faf fag fai far fas fat fba fbb fbd fbe fbf fbg fbi fbr fbs fbt fda fdb fdd fde fdf fdg fdi fdr fds fdt fea feb fed fee fef feg fei fer fes fet ffa ffd ffe fff ffg ffi ffr ffs fft fga fgb fgd fge fgf fgg fgi fgr fgs fgt fia fib fid fie fif fig fii fir fis fit fra frb frd fre frf frg fri frr frs frt fsa fsb fsd fse fsf fsg fsi fsr fss fst fta ftb ftd fte ftf ftg fti ftr fts ftt g-d gaa gab gad gae gaf gag gai gar gas gat gba gbd gbe gbf gbg gbi gbr gbs gbt gda gdb gdd gde gdf gdi gdr gds gdt ge- gea geb ged gee gef geg gei ger ges get gfa gfb gfd gfe gff gfi gfr gfs gft gga ggb ggd ggg ggi ggr ggs ggt gia gib gid gie gif gig gii gir gis git gra grb grd gre grf grg gri grr grs grt gsa gsb gsd gse gsf gsg gsi gsr gss gst gta gtb gtd gte gtf gtg gti gtr gts gtt i-d i-f ia- iaa iab iad iae iaf iag iai iar ias iat iba ibb ibd ibe ibf ibg ibi ibr ibs ibt ida idb idd ide idf idg idi idr ids idt ie- iea ied iee ief ieg iei ier ies iet ifa ifb ifd ife iff ifg ifi ifr ifs ift iga igb igd ige igf igg igi igr igs igt iia iib iid iie iif iii iir iis iit ir- ira irb ird ire irf irg iri irr irs irt is- isa isb isd ise isf isg isi isr iss ist ita itb itd ite itf itg iti its itt ra- raa rab rad rae raf rag rai rar ras rat rba rbb rbd rbe rbf rbg rbi rbr rbs rbt rda rdb rdd rde rdf rdg rdi rdr rds rdt re- rea reb red ree ref reg rei rer res ret rfa rfb rfd rfe rff rfg rfi rfr rfs rft rga rgb rgd rge rgf rgg rgi rgr rgs rgt ria rib rid rie rif rig rii rir ris rit rra rrb rrd rrf rrg rri rrr rrs rrt rsa rsb rsd rse rsf rsg rsi rsr rss rst rta rtb rtd rte rtf rtg rti rtr rts rtt saa sab sad sae saf sag sai sar sas sat sba sbb sbd sbe sbf sbg sbi sbr sbs sbt sda sdb sdd sde sdf sdg sdi sdr sds sdt se- sea seb sed see sef seg sei ser ses set sfa sfb sfd sfe sff sfg sfi sfr sfs sft sga sgb sgd sge sgf sgg sgi sgr sgs sgt sia sib sid sie sif sig sii sir sis sit sr- sra srb srd sre srf srg sri srr srs srt ss- ssa ssb ssd sse ssf ssg ssi ssr sss sst sta stb std ste stf stg sti str sts stt taa tab tad tae taf tag tai tar tas tat tba tbb tbd tbe tbf tbg tbi tbr tbs tbt tda tdb tdd tde tdf tdg tdi tdr tds tdt te- tea teb ted tee tef teg tei ter tes tet tfa tfb tfd tfe tff tfg tfi tfr tfs tft tga tgb tge tgf tgg tgi tgr tgs tgt tia tib tid tie tif tig tii tir tis tit tra trb trd tre trf trg tri trr trs trt