-er a-a a-b a-i a-t aaa aab aae aaf aag aai aak aan aar aas aat ab- aba abb abe abf abg abi abk abn abr abs abt aea aeb aee aef aeg aei aek aen aer aes aet af- afa afb afe aff afg afi afk afn afr afs aft ag- aga agb age agf agg agi agk agn agr ags agt ai- aia aib aie aif aig aii aik ain air ais ait aka akb ake akg aki akk akn akr aks an- ana anb ane anf ang ani ank ann anr ans ant ar- ara arb are arf arg ari ark arn arr ars art as- asa asb ase asf asg asi ask asn asr ass ast at- ata atb ate atf atg ati atn atr ats att baa bab bae baf bag bai bak ban bar bas bat bba bbb bbe bbf bbg bbi bbk bbn bbr bbs bbt be- bea beb bee bef beg bei bek ben ber bes bet bfa bfb bfe bff bfg bfi bfn bfr bfs bft bga bgb bge bgf bgg bgi bgk bgn bgr bgs bgt bi- bia bib bie bif big bii bik bin bir bis bit bka bkb bke bkf bkg bkk bkn bkr bks bkt bna bnb bne bnf bng bni bnk bnn bnr bns bnt bra brb bre brf brg bri brk brn brr brs brt bsa bsb bse bsf bsg bsi bsk bsn bsr bss bst bta btb bte btf btg bti btk btn btr bts btt eaa eab eae eaf eag eai eak ean ear eas eat eba ebb ebe ebf ebg ebi ebk ebn ebr ebs ebt eea eeb eee eef eeg eek 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 eik ein eir eis eit eka ekb eke ekf ekg eki ekr eks ekt en- ena enb ene enf eng eni enk enn enr ens ent era erb ere erf erg eri erk ern err ers ert es- esa esb ese esf esg esi esk esn esr ess est eta etb ete etf etg eti etk etn etr ets ett faa fab fae faf fag fai fak fan far fas fat fba fbb fbe fbf fbg fbi fbk fbn fbr fbs fbt fea feb fee fef feg fei fek fen fer fes fet ffa ffe fff ffg ffi ffk ffn ffr ffs fft fga fgb fge fgf fgg fgi fgn fgr fgs fgt fia fib fie fif fig fii fik fin fir fis fit fka fkb fkf fkg fki fkk fkt fna fnb fne fnf fng fni fnk fnn fnr fns fnt fra frb fre frf frg fri frk frn frr frs frt fsa fsb fse fsf fsg fsi fsk fsn fsr fss fst fta ftb fte ftf ftg fti ftk ftn ftr fts ftt gaa gab gae gaf gag gai gak gan gar gas gat gba gbe gbf gbg gbi gbk gbn gbr gbs gbt ge- gea geb gee gef geg gei gek gen ger ges get gfa gfb gfe gff gfi gfk gfr gfs gft gga ggb ggg ggi ggn ggr ggs ggt gia gib gie gif gig gii gik gin gir gis git gka gkb gkn gks gkt gna gnb gne gnf gni gnn gnr gns gnt gra grb gre grf grg gri grk grn grr grs grt gsa gsb gse gsf gsg gsi gsk gsn gsr gss gst gta gtb gte gtf gtg gti gtk gtn gtr gts gtt i-f ia- iaa iab iae iaf iag iai ian iar ias iat iba ibb ibe ibf ibg ibi ibk ibn ibr ibs ibt ie- iea iee ief ieg iei iek ien ier ies iet ifa ifb ife iff ifg ifi ifn ifr ifs ift iga igb ige igf igg igi igk ign igr igs igt iia iib iie iif iii iin iir iis iit ika ikb ike ikf iki ikk ikr iks ikt in- ina inb ine inf ing ini ink inn inr ins int ir- ira irb ire irf irg iri irk irn irr irs irt is- isa isb ise isf isg isi isk isn isr iss ist ita itb ite itf itg iti itk itn its itt k-t ka- kaa kab kae kaf kag kai kak kan kar kas kat kba kbb kbe kbf kbi kbk kbn kbr kbs ke- kea keb kee kef keg kei kek ken ker kes ket kfa kff kfg kfi kfs kga kgb kgf kgi kgs kia kib kie kif kig kii kik kin kir kis kit kkb kke kki kkk kkn kkr kks kkt kn- kna kne knf kng kni knk knn knr knt kra krf krg kri krk krn krr krs krt ksa ksb kse ksf ksg ksi ksk ksn ksr kss kst kta ktb kte ktf ktg ktk ktn ktr kts ktt n-i naa nab nae naf nag nai nak nan nar nas nat nba nbb nbe nbf nbg nbi nbk nbn nbr nbs nbt ne- nea neb nee nef neg nei nek nen ner nes net nfa nfb nfe nff nfi nfk nfn nfr nfs nft nga ngb nge ngf ngg ngi ngk ngn ngs ngt nia nib nie nif nig nii nik nin nir nis nit nka nke nkf nki nkk nkn nkr nks nkt nna nnb nne nnf nng nni nnk nnn nns nnt nra nrb nre nrf nrg nri nrk nrn nrr nrs nrt nsa nsb nse nsf nsg nsi nsk nsn nsr nss nst nta ntb nte ntf ntg nti ntk ntn ntr nts ntt ra- raa rab rae raf rag rai rak ran rar ras rat rba rbb rbe rbf rbg rbi rbk rbn rbr rbs rbt re- rea reb ree ref reg rei rek ren rer res ret rfa rfb rfe rff rfg rfi rfk rfn rfr rfs rft rga rgb rge rgf rgg rgi rgk rgn rgr rgs rgt ria rib rie rif rig rii rik rin rir ris