-er a-a a-b a-i a-t aaa aab aae aaf aag aai aan aar aas aat ab- aba abb abe abf abg abi abn abr abs abt aea aeb aee aef aeg aei aen aer aes aet af- afa afb afe aff afg afi afn afr afs aft ag- aga agb age agf agg agi agn agr ags agt ai- aia aib aie aif aig aii ain air ais ait an- ana anb ane anf ang ani ann anr ans ant ar- ara arb are arf arg ari arn arr ars art as- asa asb ase asf asg asi asn asr ass ast at- ata atb ate atf atg ati atn atr ats att baa bab bae baf bag bai ban bar bas bat bba bbb bbe bbf bbg bbi bbn bbr bbs bbt be- bea beb bee bef beg bei ben ber bes bet bfa bfb bfe bff bfg bfi bfn bfr bfs bft bga bgb bge bgf bgg bgi bgn bgr bgs bgt bi- bia bib bie bif big bii bin bir bis bit bna bnb bne bnf bng bni bnn bnr bns bnt bra brb bre brf brg bri brn brr brs brt bsa bsb bse bsf bsg bsi bsn bsr bss bst bta btb bte btf btg bti btn btr bts btt eaa eab eae eaf eag eai ean ear eas eat eba ebb ebe ebf ebg ebi ebn ebr ebs ebt eea eeb eee eef eeg een eer ees eet ef- efa efb efe eff efg efi efr efs eft ega egb ege egf egg egi egn egr egs egt eia eib eie eif eig eii ein eir eis eit en- ena enb ene enf eng eni enn enr ens ent era erb ere erf erg eri ern err ers ert es- esa esb ese esf esg esi esn esr ess est eta etb ete etf etg eti etn etr ets ett faa fab fae faf fag fai fan far fas fat fba fbb fbe fbf fbg fbi fbn fbr fbs fbt fea feb fee fef feg fei fen fer fes fet ffa ffe fff ffg ffi ffn ffr ffs fft fga fgb fge fgf fgg fgi fgn fgr fgs fgt fia fib fie fif fig fii fin fir fis fit fna fnb fne fnf fng fni fnn fnr fns fnt fra frb fre frf frg fri frn frr frs frt fsa fsb fse fsf fsg fsi fsn fsr fss fst fta ftb fte ftf ftg fti ftn ftr fts ftt gaa gab gae gaf gag gai gan gar gas gat gba gbe gbf gbg gbi gbn gbr gbs gbt ge- gea geb gee gef geg gei gen ger ges get gfa gfb gfe gff gfi gfr gfs gft gga ggb ggg ggi ggn ggr ggs ggt gia gib gie gif gig gii gin gir gis git gna gnb gne gnf gni gnn gnr gns gnt gra grb gre grf grg gri grn grr grs grt gsa gsb gse gsf gsg gsi gsn gsr gss gst gta gtb gte gtf gtg gti gtn gtr gts gtt i-f ia- iaa iab iae iaf iag iai ian iar ias iat iba ibb ibe ibf ibg ibi ibn ibr ibs ibt ie- iea iee ief ieg iei ien ier ies iet ifa ifb ife iff ifg ifi ifn ifr ifs ift iga igb ige igf igg igi ign igr igs igt iia iib iie iif iii iin iir iis iit in- ina inb ine inf ing ini inn inr ins int ir- ira irb ire irf irg iri irn irr irs irt is- isa isb ise isf isg isi isn isr iss ist ita itb ite itf itg iti itn its itt n-i naa nab nae naf nag nai nan nar nas nat nba nbb nbe nbf nbg nbi nbn nbr nbs nbt ne- nea neb nee nef neg nei nen ner nes net nfa nfb nfe nff nfi nfn nfr nfs nft nga ngb nge ngf ngg ngi ngn ngs ngt nia nib nie nif nig nii nin nir nis nit nna nnb nne nnf nng nni nnn nns nnt nra nrb nre nrf nrg nri nrn nrr nrs nrt nsa nsb nse nsf nsg nsi nsn nsr nss nst nta ntb nte ntf ntg nti ntn ntr nts ntt ra- raa rab rae raf rag rai ran rar ras rat rba rbb rbe rbf rbg rbi rbn rbr rbs rbt re- rea reb ree ref reg rei ren rer res ret rfa rfb rfe rff rfg rfi rfn rfr rfs rft rga rgb rge rgf rgg rgi rgn rgr rgs rgt ria rib rie rif rig rii rin rir ris rit rna rnb rng rni rnn rnr rns rnt rra rrb rrf rrg rri rrn rrr rrs rrt rsa rsb rse rsf rsg rsi rsn rsr rss rst rta rtb rte rtf rtg rti rtn rtr rts rtt saa sab sae saf sag sai san sar sas sat sba sbb sbe sbf sbg sbi sbn sbr sbs sbt se- sea seb see sef seg sei sen ser ses set sfa sfb sfe sff sfg sfi sfn sfr sfs sft sga sgb sge sgf sgg sgi sgn sgr sgs sgt sia sib sie sif sig sii sin sir sis sit sna snb sne snf sng sni snn snr sns snt sr- sra srb sre srf srg sri srn srr srs srt ss- ssa ssb sse ssf ssg ssi ssn ssr sss sst sta stb ste stf stg sti stn str sts stt taa tab tae taf tag tai tan tar tas tat tba tbb tbe tbf tbg tbi tbn tbr tbs tbt te- tea teb tee tef teg tei ten ter tes tet tfa tfb tfe tff tfg tfi tfn tfr tfs tft tga tgb tge tgf tgg tgi tgn tgr tgs tgt tia tib tie tif tig tii tin tir tis tit tna tnb tne tnf tng tni tnn tnr tns tnt tra trb tre trf trg tri trn trr trs trt tsa tsb tse tsf tsg