-ic a-a a-c a-i aaa aac aaf aag aai aan aao aar aas ac- aca acc acf acg aci acn aco acr acs af- afa afc aff afg afi afn afo afr afs ag- aga agc agf agg agi agn ago agr ags ai- aia aic aif aig aii ain aio air ais an- ana anc anf ang ani ann ano anr ans aoa aoc aof aog aoi aon aoo aor aos ar- ara arc arf arg ari arn aro arr ars as- asa asc asf asg asi asn aso asr ass c-- caa cac caf cag cai can cao car cas cca ccc ccf ccg cci ccn cco ccr ccs cfa cfc cff cfg cfi cfn cfo cfr cfs cga cgc cgg cgi cgn cgo cgr cgs ci- cia cic cif cig cii cin cio cir cis cn- cna cnc cnf cng cni cnn cno cnr cns co- coa coc cof cog coi con coo cor cos cra crc crf crg cri crn cro crr crs csa csc csf csg csi csn cso csr css faa fac faf fag fai fan fao far fas fca fcc fcf fcg fci fcn fco fcr fcs ffa ffc fff ffg ffi ffn ffo ffr ffs fga fgc fgf fgg fgi fgn fgr fgs fia fic fif fig fii fin fir fis fna fnc fnf fng fni fnn fnr fns foa foc fof fog foi fon foo for fos fra frc frf frg fri frn fro frr frs fsa fsc fsf fsg fsi fsn fso fsr fss gaa gac gaf gag gai gan gao gar gas gca gcc gcf gcg gci gcn gco gcr gcs gfa gfc gff gfi gfo gfr gfs gga ggc ggg ggi ggn ggo ggr ggs gia gic gif gig gii gin gio gir gis gna gnc gnf gni gnn gno gnr gns goa goc gof gog goi gon goo gor gos gra grc grf grg gri grn gro grr grs gsa gsc gsf gsg gsi gsn gso gsr gss i-f ia- iaa iac iaf iag iai ian iao iar ias ica icc icf icg ici icn ico icr ics ifa ifc iff ifg ifi ifn ifo ifr ifs iga igc igf igg igi ign igo igr igs iia iic iif iii iin iio iir iis in- ina inc inf ing ini inn ino inr ins io- ioa ioc iof iog ioi ion ioo ior ios ir- ira irc irf irg iri irn iro irr irs is- isa isc isf isg isi isn iso isr iss n-i naa nac naf nag nai nan nao nar nas nca ncc ncf ncg nci ncn nco ncr ncs nfa nfc nff nfi nfn nfo nfr nfs nga ngc ngf ngg ngi ngn ngo ngs nia nic nif nig nii nin nio nir nis nna nnc nnf nng nni nnn nno nns no- noa noc nof nog noi non noo nor nos nra nrc nrf nrg nri nrn nro nrr nrs nsa nsc nsf nsg nsi nsn nso nsr nss o-i oaa oac oaf oag oai oan oao oar oas oc- oca occ ocf ocg oci ocn oco ocr ocs of- ofa ofc off ofg ofi ofn ofo ofr ofs oga ogc ogf ogg ogi ogn ogo ogs oia oic oif oii oin oio oir ois on- ona onc onf ong oni onn ono onr ons oo- ooa ooc oof oog ooi oon ooo oor oos or- ora orc orf org ori orn oro orr ors os- osa osc osf osg osi osn oso osr oss ra- raa rac raf rag rai ran rao rar ras rca rcc rcf rcg rci rcn rco rcr rcs rfa rfc rff rfg rfi rfn rfo rfr rfs rga rgc rgf rgg rgi rgn rgo rgr rgs ria ric rif rig rii rin rio rir ris rna rnc rng rni rnn rno rnr rns roa roc rof rog roi ron roo ror ros rra rrc rrf rrg rri rrn rrr rrs rsa rsc rsf rsg rsi rsn rso rsr rss saa sac saf sag sai san sao sar sas sca scc scf scg sci scn sco scr scs sfa sfc sff sfg sfi sfn sfo sfr sfs sga sgc sgf sgg sgi sgn sgo sgr sgs sia sic sif sig sii sin sio sir sis sna snc snf sng sni snn sno snr sns soa soc sof sog soi son soo sor sos sr- sra src srf srg sri srn sro srr srs ss- ssa ssc ssf ssg ssi ssn sso ssr sss