-ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aai aan aao aas aat ab- aba abb abc abe abf abi abn abo abs abt ac- aca acb acc ace acf aci acn aco acs act aea aeb aec aee aef aei aen aeo aes aet af- afa afb afc afe aff afi afn afo afs aft ai- aia aib aic aie aif aii ain aio ais ait an- ana anb anc ane anf ani ann ano ans ant aoa aob aoc aoe aof aoi aon aoo aos aot as- asa asb asc ase asf asi asn aso ass ast at- ata atb atc ate atf ati atn ato ats att baa bab bac bae baf bai ban bao bas bat bba bbb bbc bbe bbf bbi bbn bbo bbs bbt bca bcb bcc bce bcf bci bcn bco bcs bct be- bea beb bec bee bef bei ben beo bes bet bfa bfb bfc bfe bff bfi bfn bfo bfs bft bi- bia bib bic bie bif bii bin bio bis bit bna bnb bnc bne bnf bni bnn bno bns bnt boa bob boc boe bof boi bon boo bos bot bsa bsb bsc bse bsf bsi bsn bso bss bst bta btb btc bte btf bti btn bto bts btt c-- caa cab cac cae caf cai can cao cas cat cba cbb cbc cbe cbf cbi cbn cbo cbs cbt cca ccb ccc cce ccf cci ccn cco ccs cct ce- cea ceb cec cee cef cei cen ceo ces cet cfa cfb cfc cfe cff cfi cfn cfo cfs cft ci- cia cib cic cie cif cii cin cio cis cit cn- cna cnb cnc cne cnf cni cnn cno cns cnt co- coa cob coc coe cof coi con coo cos cot csa csb csc cse csf csi csn cso css cst cta ctb ctc cte ctf cti ctn cto cts ctt eaa eab eac eae eaf eai ean eao eas eat eba ebb ebc ebe ebf ebi ebn ebo ebs ebt ec- eca ecb ecc ece ecf eci ecn eco ecs ect eea eeb eec eee eef een eeo ees eet ef- efa efb efc efe eff efi efo efs eft eia eib eic eie eif eii ein eio eis eit en- ena enb enc ene enf eni enn eno ens ent eo- eoa eob eoc eoe eof eoi eon eoo eos eot es- esa esb esc ese esf esi esn eso ess est eta etb etc ete etf eti etn eto ets ett faa fab fac fae faf fai fan fao fas fat fba fbb fbc fbe fbf fbi fbn fbo fbs fbt fca fcb fcc fce fcf fci fcn fco fcs fct fea feb fec fee fef fei fen feo fes fet ffa ffc ffe fff ffi ffn ffo ffs fft fia fib fic fie fif fii fin fis fit fna fnb fnc fne fnf fni fnn fns fnt foa fob foc foe fof foi fon foo fos fot fsa fsb fsc fse fsf fsi fsn fso fss fst fta ftb ftc fte ftf fti ftn fto fts ftt i-f ia- iaa iab iac iae iaf iai ian iao ias iat iba ibb ibc ibe ibf ibi ibn ibo ibs ibt ica icb icc ice icf ici icn ico ics ict ie- iea iec iee ief iei ien ies iet ifa ifb ifc ife iff ifi ifn ifo ifs ift iia iib iic iie iif iii iin iio iis iit in- ina inb inc ine inf ini inn ino ins int io- ioa iob ioc ioe iof ioi ion ioo ios iot is- isa isb isc ise isf isi isn iso iss ist ita itb itc ite itf iti itn ito its itt n-i naa nab nac nae naf nai nan nao nas nat nba nbb nbc nbe nbf nbi nbn nbo nbs nbt nca ncb ncc nce ncf nci ncn nco ncs nct ne- nea neb nec nee nef nei nen neo nes net nfa nfb nfc nfe nff nfi nfn nfo nfs nft nia nib nic nie nif nii nin nio nis nit nna nnb nnc nne nnf nni nnn nno nns nnt no- noa nob noc noe nof noi non noo nos not nsa nsb nsc nse nsf nsi nsn nso nss nst nta ntb ntc nte ntf nti ntn nto nts ntt o-i oaa oab oac oae oaf oai oan oao oas oat ob- oba obb obc obe obf obi obn obo obs obt oc- oca ocb occ ocf oci ocn oco ocs oct oea oeb oec oee oef oei oen oeo oes oet of- ofa ofb ofc ofe off ofi ofn ofo ofs oft oia oib oic oie oif oii oin oio ois oit on- ona onb onc one onf oni onn ono ons ont oo- ooa oob ooc oof ooi oon ooo oos oot os- osa osb osc ose osf osi osn oso oss ost ot- ota otb otc ote otf oti otn oto ots ott saa sab sac sae saf sai san sao sas sat sba sbb sbc sbe sbf sbi sbn sbo sbs sbt sca scb scc sce scf sci scn sco scs sct se- sea seb sec see sef sei sen seo ses set sfa sfb sfc sfe sff sfi sfn sfo sfs sft sia sib sic sie sif sii sin sio sis sit sna snb snc sne snf sni snn sno sns snt soa sob soc soe sof soi son soo sos sot ss- ssa ssb ssc sse ssf ssi ssn sso sss sst sta stb stc ste stf sti stn sto sts stt taa tab tac tae taf tai tan tao tas tat tba tbb tbc tbe tbf tbi tbn tbo tbs tbt tca tcb tcc tce tcf tci tcn tco tcs tct te- tea teb tec tee tef tei ten teo tes tet tfa tfb tfc tfe tff tfi tfn tfo tfs tft tia tib tic tie tif tii tin tio tis tit tna tnb tnc tne