-er a-a a-b a-i a-t aaa aab aae aaf aag aai aan aao aar aas aat ab- aba abb abe abf abg abi abn abo abr abs abt aea aeb aee aef aeg aei aen aeo aer aes aet af- afa afb afe aff afg afi afn afo afr afs aft ag- aga agb age agf agg agi agn ago agr ags agt ai- aia aib aie aif aig aii ain aio air ais ait an- ana anb ane anf ang ani ann ano anr ans ant aoa aob aoe aof aog aoi aon aoo aor aos aot ar- ara arb are arf arg ari arn aro arr ars art as- asa asb ase asf asg asi asn aso asr ass ast at- ata atb ate atf atg ati atn ato atr ats att baa bab bae baf bag bai ban bao bar bas bat bba bbb bbe bbf bbg bbi bbn bbo bbr bbs bbt be- bea beb bee bef beg bei ben beo ber bes bet bfa bfb bfe bff bfg bfi bfn bfo bfr bfs bft bga bgb bge bgf bgg bgi bgn bgo bgr bgs bgt bi- bia bib bie bif big bii bin bio bir bis bit bna bnb bne bnf bng bni bnn bno bnr bns bnt boa bob boe bof bog boi bon boo bor bos bot bra brb bre brf brg bri brn bro brr brs brt bsa bsb bse bsf bsg bsi bsn bso bsr bss bst bta btb bte btf btg bti btn bto btr bts btt eaa eab eae eaf eag eai ean eao ear eas eat eba ebb ebe ebf ebg ebi ebn ebo ebr ebs ebt eea eeb eee eef eeg een eeo eer ees eet ef- efa efb efe eff efg efi efo efr efs eft ega egb ege egf egg egi egn ego egr egs egt eia eib eie eif eig eii ein eio eir eis eit en- ena enb ene enf eng eni enn eno enr ens ent eo- eoa eob eoe eof eog eoi eon eoo eor eos eot era erb ere erf erg eri ern ero err ers ert es- esa esb ese esf esg esi esn eso esr ess est eta etb ete etf etg eti etn eto etr ets ett faa fab fae faf fag fai fan fao far fas fat fba fbb fbe fbf fbg fbi fbn fbo fbr fbs fbt fea feb fee fef feg fei fen feo fer fes fet ffa ffe fff ffg ffi ffn ffo 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 foa fob foe fof fog foi fon foo for fos fot fra frb fre frf frg fri frn fro frr frs frt fsa fsb fse fsf fsg fsi fsn fso fsr fss fst fta ftb fte ftf ftg fti ftn fto ftr fts ftt gaa gab gae gaf gag gai gan gao gar gas gat gba gbe gbf gbg gbi gbn gbo gbr gbs gbt ge- gea geb gee gef geg gei gen geo ger ges get gfa gfb gfe gff gfi gfo gfr gfs gft gga ggb ggg ggi ggn ggo ggr ggs ggt gia gib gie gif gig gii gin gio gir gis git gna gnb gne gnf gni gnn gno gnr gns gnt goa gob goe gof gog goi gon goo gor gos got gra grb gre grf grg gri grn gro grr grs grt gsa gsb gse gsf gsg gsi gsn gso gsr gss gst gta gtb gte gtf gtg gti gtn gto gtr gts gtt i-f ia- iaa iab iae iaf iag iai ian iao iar ias iat iba ibb ibe ibf ibg ibi ibn ibo ibr ibs ibt ie- iea iee ief ieg iei ien ier ies iet ifa ifb ife iff ifg ifi ifn ifo ifr ifs ift iga igb ige igf igg igi ign igo igr igs igt iia iib iie iif iii iin iio iir iis iit in- ina inb ine inf ing ini inn ino inr ins int io- ioa iob ioe iof iog ioi ion ioo ior ios iot ir- ira irb ire irf irg iri irn iro irr irs irt is- isa isb ise isf isg isi isn iso isr iss ist ita itb ite itf itg iti itn ito its itt n-i naa nab nae naf nag nai nan nao nar nas nat nba nbb nbe nbf nbg nbi nbn nbo nbr nbs nbt ne- nea neb nee nef neg nei nen neo ner nes net nfa nfb nfe nff nfi nfn nfo nfr nfs nft nga ngb nge ngf ngg ngi ngn ngo ngs ngt nia nib nie nif nig nii nin nio nir nis nit nna nnb nne nnf nng nni nnn nno nns nnt no- noa nob noe nof nog noi non noo nor nos not nra nrb nre nrf nrg nri nrn nro nrr nrs nrt nsa nsb nse nsf nsg nsi nsn nso nsr nss nst nta ntb nte ntf ntg nti ntn nto ntr nts ntt o-i oaa oab oae oaf oag oai oan oao oar oas oat ob- oba obb obe obf obg obi obn obo obr obs obt oea oeb oee oef oeg oei oen oeo oer oes oet of- ofa ofb ofe off ofg ofi ofn ofo ofr ofs oft oga oge ogf ogg ogi ogn ogo ogs ogt oia oib oie oif oii oin oio oir ois oit on- ona onb one onf ong oni onn ono onr ons ont oo- ooa oob oof oog ooi oon ooo oor oos oot or- ora orb ore orf org ori orn oro orr ors ort os- osa osb ose osf osg osi osn oso osr oss ost ot- ota otb ote otf otg oti otn oto otr ots ott ra- raa rab rae raf rag rai ran rao rar ras rat rba rbb rbe rbf rbg