-ic a-a a-b a-c a-i a-t aaa aab aac aaf aai aan aao aar aas aat ab- aba abb abc abf abi abn abo abr abs abt ac- aca acb acc acf aci acn aco acr acs act af- afa afb afc aff afi afn afo afr afs aft ai- aia aib aic aif aii ain aio air ais ait an- ana anb anc anf ani ann ano anr ans ant aoa aob aoc aof aoi aon aoo aor aos aot ar- ara arb arc arf ari arn aro arr ars art as- asa asb asc asf asi asn aso asr ass ast at- ata atb atc atf ati atn ato atr ats att baa bab bac baf bai ban bao bar bas bat bba bbb bbc bbf bbi bbn bbo bbr bbs bbt bca bcb bcc bcf bci bcn bco bcr bcs bct bfa bfb bfc bff bfi bfn bfo bfr bfs bft bi- bia bib bic bif bii bin bio bir bis bit bna bnb bnc bnf bni bnn bno bnr bns bnt boa bob boc bof boi bon boo bor bos bot bra brb brf bri brn bro brr brs brt bsa bsb bsc bsf bsi bsn bso bsr bss bst bta btb btc btf bti btn bto btr bts btt c-- caa cab cac caf cai can cao car cas cat cba cbb cbc cbf cbi cbn cbo cbr cbs cbt cca ccb ccc ccf cci ccn cco ccr ccs cct cfa cfb cfc cff cfi cfn cfo cfr cfs cft ci- cia cib cic cif cii cin cio cir cis cit cn- cna cnb cnc cnf cni cnn cno cnr cns cnt co- coa cob coc cof coi con coo cor cos cot cra crb crc crf cri crn cro crr crs crt csa csb csc csf csi csn cso csr css cst cta ctb ctc ctf cti ctn cto ctr cts ctt faa fab fac faf fai fan fao far fas fat fba fbb fbc fbf fbi fbn fbo fbr fbs fbt fca fcb fcc fcf fci fcn fco fcr fcs fct ffa ffc fff ffi ffn ffo ffr ffs fft fia fib fic fif fii fin fir fis fit fna fnb fnc fnf fni fnn fnr fns fnt foa fob foc fof foi fon foo for fos fot fra frb frc frf fri frn fro frr frs frt fsa fsb fsc fsf fsi fsn fso fsr fss fst fta ftb ftc ftf fti ftn fto ftr fts ftt i-f ia- iaa iab iac iaf iai ian iao iar ias iat iba ibb ibc ibf ibi ibn ibo ibr ibs ibt ica icb icc icf ici icn ico icr ics ict ifa ifb ifc iff ifi ifn ifo ifr ifs ift iia iib iic iif iii iin iio iir iis iit in- ina inb inc inf ini inn ino inr ins int io- ioa iob ioc iof ioi ion ioo ior ios iot ir- ira irb irc irf iri irn iro irr irs irt is- isa isb isc isf isi isn iso isr iss ist ita itb itc itf iti itn ito its itt n-i naa nab nac naf nai nan nao nar nas nat nba nbb nbc nbf nbi nbn nbo nbr nbs nbt nca ncb ncc ncf nci ncn nco ncr ncs nct nfa nfb nfc nff nfi nfn nfo nfr nfs nft nia nib nic nif nii nin nio nir nis nit nna nnb nnc nnf nni nnn nno nns nnt no- noa nob noc nof noi non noo nor nos not nra nrb nrc nrf nri nrn nro nrr nrs nrt nsa nsb nsc nsf nsi nsn nso nsr nss nst nta ntb ntc ntf nti ntn nto ntr nts ntt o-i oaa oab oac oaf oai oan oao oar oas oat ob- oba obb obc obf obi obn obo obr obs obt oc- oca ocb occ ocf oci ocn oco ocr ocs oct of- ofa ofb ofc off ofi ofn ofo ofr ofs oft oia oib oic oif oii oin oio oir ois oit on- ona onb onc onf oni onn ono onr ons ont oo- ooa oob ooc oof ooi oon ooo oor oos oot or- ora orb orc orf ori orn oro orr ors ort os- osa osb osc osf osi osn oso osr oss ost ot- ota otb otc otf oti otn oto otr ots ott ra- raa rab rac raf rai ran rao rar ras rat rba rbb rbc rbf rbi rbn rbo rbr rbs rbt rca rcb rcc rcf rci rcn rco rcr rcs rct rfa rfb rfc rff rfi rfn rfo rfr rfs rft ria rib ric rif rii rin rio rir ris rit rna rnb rnc rni rnn rno rnr rns rnt roa rob roc rof roi ron roo ror ros rot rra rrb rrc rrf rri rrn rrr rrs rrt rsa rsb rsc rsf rsi rsn rso rsr rss rst rta rtb rtc rtf rti rtn rto rtr rts rtt saa sab sac saf sai san sao sar sas sat sba sbb sbc sbf sbi sbn sbo sbr sbs sbt sca scb scc scf sci scn sco scr scs sct sfa sfb sfc sff sfi sfn sfo sfr sfs sft sia sib sic sif sii sin sio sir sis sit sna snb snc snf sni snn sno snr sns snt soa sob soc sof soi son soo sor sos sot sr- sra srb src srf sri srn sro srr srs srt ss- ssa ssb ssc ssf ssi ssn sso ssr sss sst sta stb stc stf sti stn sto str sts stt taa tab tac taf tai tan tao tar tas tat tba tbb tbc tbf tbi tbn tbo tbr tbs tbt tca tcb tcc tcf tci tcn tco tcr tcs tct tfa tfb tfc tff tfi tfn tfo tfr tfs tft tia tib tic tif tii tin tio tir tis tit tna tnb tnc tnf tni tnn tno tnr tns tnt to- toa tob toc tof toi ton too tor