a-a a-b a-i a-t aaa aab aae aaf aai aan aao aas aat ab- aba abb abe abf abi abn abo abs abt aea aeb aee aef aei aen aeo aes aet af- afa afb afe aff afi afn afo afs aft ai- aia aib aie aif aii ain aio ais ait an- ana anb ane anf ani ann ano ans ant aoa aob aoe aof aoi aon aoo aos aot as- asa asb ase asf asi asn aso ass ast at- ata atb ate atf ati atn ato ats att baa bab bae baf bai ban bao bas bat bba bbb bbe bbf bbi bbn bbo bbs bbt be- bea beb bee bef bei ben beo bes bet bfa bfb bfe bff bfi bfn bfo bfs bft bi- bia bib bie bif bii bin bio bis bit bna bnb bne bnf bni bnn bno bns bnt boa bob boe bof boi bon boo bos bot bsa bsb bse bsf bsi bsn bso bss bst bta btb bte btf bti btn bto bts btt eaa eab eae eaf eai ean eao eas eat eba ebb ebe ebf ebi ebn ebo ebs ebt eea eeb eee eef een eeo ees eet ef- efa efb efe eff efi efo efs eft eia eib eie eif eii ein eio eis eit en- ena enb ene enf eni enn eno ens ent eo- eoa eob eoe eof eoi eon eoo eos eot es- esa esb ese esf esi esn eso ess est eta etb ete etf eti etn eto ets ett faa fab fae faf fai fan fao fas fat fba fbb fbe fbf fbi fbn fbo fbs fbt fea feb fee fef fei fen feo fes fet ffa ffe fff ffi ffn ffo ffs fft fia fib fie fif fii fin fis fit fna fnb fne fnf fni fnn fns fnt foa fob foe fof foi fon foo fos fot fsa fsb fse fsf fsi fsn fso fss fst fta ftb fte ftf fti ftn fto fts ftt i-f ia- iaa iab iae iaf iai ian iao ias iat iba ibb ibe ibf ibi ibn ibo ibs ibt ie- iea iee ief iei ien ies iet ifa ifb ife iff ifi ifn ifo ifs ift iia iib iie iif iii iin iio iis iit in- ina inb ine inf ini inn ino ins int io- ioa iob ioe iof ioi ion ioo ios iot is- isa isb ise isf isi isn iso iss ist ita itb ite itf iti itn ito its itt n-i naa nab nae naf nai nan nao nas nat nba nbb nbe nbf nbi nbn nbo nbs nbt ne- nea neb nee nef nei nen neo nes net nfa nfb nfe nff nfi nfn nfo nfs nft nia nib nie nif nii nin nio nis nit nna nnb nne nnf nni nnn nno nns nnt no- noa nob noe nof noi non noo nos not nsa nsb nse nsf nsi nsn nso nss nst nta ntb nte ntf nti ntn nto nts ntt o-i oaa oab oae oaf oai oan oao oas oat ob- oba obb obe obf obi obn obo obs obt oea oeb oee oef oei oen oeo oes oet of- ofa ofb ofe off ofi ofn ofo ofs oft oia oib oie oif oii oin oio ois oit on- ona onb one onf oni onn ono ons ont oo- ooa oob oof ooi oon ooo oos oot os- osa osb ose osf osi osn oso oss ost ot- ota otb ote otf oti otn oto ots ott saa sab sae saf sai san sao sas sat sba sbb sbe sbf sbi sbn sbo sbs sbt se- sea seb see sef sei sen seo ses set sfa sfb sfe sff sfi sfn sfo sfs sft sia sib sie sif sii sin sio sis sit sna snb sne snf sni snn sno sns snt soa sob soe sof soi son soo sos sot ss- ssa ssb sse ssf ssi ssn sso sss sst sta stb ste stf sti stn sto sts stt taa tab tae taf tai tan tao tas tat tba tbb tbe tbf tbi tbn tbo tbs tbt te- tea teb tee tef tei ten teo tes tet tfa tfb tfe tff tfi tfn tfo tfs tft tia tib tie tif tii tin tio tis tit tna tnb tne tnf tni tnn tno tns tnt to- toa tob toe tof toi ton too tos tot tsa tsb tse tsf tsi tsn tso tss tst tta ttb tte ttf tti ttn tto tts ttt