a-a a-b a-i a-t aaa aab aae aaf aag aai aak aan aao aas aat ab- aba abb abe abf abg abi abk abn abo abs abt aea aeb aee aef aeg aei aek aen aeo aes aet af- afa afb afe aff afg afi afk afn afo afs aft ag- aga agb age agf agg agi agk agn ago ags agt ai- aia aib aie aif aig aii aik ain aio ais ait aka akb ake akg aki akk akn ako aks an- ana anb ane anf ang ani ank ann ano ans ant aoa aob aoe aof aog aoi aok aon aoo aos aot as- asa asb ase asf asg asi ask asn aso ass ast at- ata atb ate atf atg ati atn ato ats att baa bab bae baf bag bai bak ban bao bas bat bba bbb bbe bbf bbg bbi bbk bbn bbo bbs bbt be- bea beb bee bef beg bei bek ben beo bes bet bfa bfb bfe bff bfg bfi bfn bfo bfs bft bga bgb bge bgf bgg bgi bgk bgn bgo bgs bgt bi- bia bib bie bif big bii bik bin bio bis bit bka bkb bke bkf bkg bkk bkn bko bks bkt bna bnb bne bnf bng bni bnk bnn bno bns bnt boa bob boe bof bog boi bok bon boo bos bot bsa bsb bse bsf bsg bsi bsk bsn bso bss bst bta btb bte btf btg bti btk btn bto bts btt eaa eab eae eaf eag eai eak ean eao eas eat eba ebb ebe ebf ebg ebi ebk ebn ebo ebs ebt eea eeb eee eef eeg eek een eeo ees eet ef- efa efb efe eff efg efi efo efs eft ega egb ege egf egg egi egn ego egs egt eia eib eie eif eig eii eik ein eio eis eit eka ekb eke ekf ekg eki eko eks ekt en- ena enb ene enf eng eni enk enn eno ens ent eo- eoa eob eoe eof eog eoi eok eon eoo eos eot es- esa esb ese esf esg esi esk esn eso ess est eta etb ete etf etg eti etk etn eto ets ett faa fab fae faf fag fai fak fan fao fas fat fba fbb fbe fbf fbg fbi fbk fbn fbo fbs fbt fea feb fee fef feg fei fek fen feo fes fet ffa ffe fff ffg ffi ffk ffn ffo ffs fft fga fgb fge fgf fgg fgi fgn fgs fgt fia fib fie fif fig fii fik fin fis fit fka fkb fkf fkg fki fkk fkt fna fnb fne fnf fng fni fnk fnn fns fnt foa fob foe fof fog foi fok fon foo fos fot fsa fsb fse fsf fsg fsi fsk fsn fso fss fst fta ftb fte ftf ftg fti ftk ftn fto fts ftt gaa gab gae gaf gag gai gak gan gao gas gat gba gbe gbf gbg gbi gbk gbn gbo gbs gbt ge- gea geb gee gef geg gei gek gen geo ges get gfa gfb gfe gff gfi gfk gfo gfs gft gga ggb ggg ggi ggn ggo ggs ggt gia gib gie gif gig gii gik gin gio gis git gka gkb gkn gko gks gkt gna gnb gne gnf gni gnn gno gns gnt goa gob goe gof gog goi gok gon goo gos got gsa gsb gse gsf gsg gsi gsk gsn gso gss gst gta gtb gte gtf gtg gti gtk gtn gto gts gtt i-f ia- iaa iab iae iaf iag iai ian iao ias iat iba ibb ibe ibf ibg ibi ibk ibn ibo ibs ibt ie- iea iee ief ieg iei iek ien ies iet ifa ifb ife iff ifg ifi ifn ifo ifs ift iga igb ige igf igg igi igk ign igo igs igt iia iib iie iif iii iin iio iis iit ika ikb ike ikf iki ikk iko iks ikt in- ina inb ine inf ing ini ink inn ino ins int io- ioa iob ioe iof iog ioi ion ioo ios iot is- isa isb ise isf isg isi isk isn iso iss ist ita itb ite itf itg iti itk itn ito its itt k-t ka- kaa kab kae kaf kag kai kak kan kao kas kat kba kbb kbe kbf kbi kbk kbn kbo kbs ke- kea keb kee kef keg kei kek ken keo kes ket kfa kff kfg kfi kfo kfs kga kgb kgf kgi kgo kgs kia kib kie kif kig kii kik kin kio kis kit kkb kke kki kkk kkn kks kkt kn- kna kne knf kng kni knk knn kno knt koa kob koe kof kog koi kok kon koo kos kot ksa ksb kse ksf ksg ksi ksk ksn kso kss kst kta ktb kte ktf ktg ktk ktn kto kts ktt n-i naa nab nae naf nag nai nak nan nao nas nat nba nbb nbe nbf nbg nbi nbk nbn nbo nbs nbt ne- nea neb nee nef neg nei nek nen neo nes net nfa nfb nfe nff nfi nfk nfn nfo nfs nft nga ngb nge ngf ngg ngi ngk ngn ngo ngs ngt nia nib nie nif nig nii nik nin nio nis nit nka nke nkf nki nkk nkn nko nks nkt nna nnb nne nnf nng nni nnk nnn nno nns nnt no- noa nob noe nof nog noi nok non noo nos not nsa nsb nse nsf nsg nsi nsk nsn nso nss nst nta ntb nte ntf ntg nti ntk ntn nto nts ntt o-i oaa oab oae oaf oag oai oak oan oao oas oat ob- oba obb obe obf obg obi obk obn obo obs obt oea oeb oee oef oeg oei oen oeo oes oet of- ofa ofb ofe off ofg ofi ofn ofo ofs oft oga oge ogf ogg ogi ogn ogo ogs ogt oia oib oie oif oii oik oin oio ois oit oka