-er -ic a-a a-c a-i aaa aac aae aaf aag aai aak aan aar aas ac- aca acc ace acf acg aci ack acn acr acs aea aec aee aef aeg aei aek aen aer aes af- afa afc afe aff afg afi afk afn afr afs ag- aga agc age agf agg agi agk agn agr ags ai- aia aic aie aif aig aii aik ain air ais aka akc ake akg aki akk akn akr aks an- ana anc ane anf ang ani ank ann anr ans ar- ara arc are arf arg ari ark arn arr ars as- asa asc ase asf asg asi ask asn asr ass c-- caa cac cae caf cag cai cak can car cas cca ccc cce ccf ccg cci cck ccn ccr ccs ce- cea cec cee cef ceg cei cek cen cer ces cfa cfc cfe cff cfg cfi cfk cfn cfr cfs cga cgc cge cgg cgi cgn cgr cgs ci- cia cic cie cif cig cii cik cin cir cis cka ckc cki cks cn- cna cnc cne cnf cng cni cnn cnr cns cra crc cre crf crg cri crk crn crr crs csa csc cse csf csg csi csk csn csr css eaa eac eae eaf eag eai eak ean ear eas ec- eca ecc ece ecf ecg eci eck ecn ecr ecs eea eec eee eef eeg eek een eer ees ef- efa efc efe eff efg efi efr efs ega egc ege egf egg egi egn egr egs eia eic eie eif eig eii eik ein eir eis eka ekc eke ekf ekg eki ekr eks en- ena enc ene enf eng eni enk enn enr ens era erc ere erf erg eri erk ern err ers es- esa esc ese esf esg esi esk esn esr ess faa fac fae faf fag fai fak fan far fas fca fcc fce fcf fcg fci fck fcn fcr fcs fea fec fee fef feg fei fek fen fer fes ffa ffc ffe fff ffg ffi ffk ffn ffr ffs fga fgc fge fgf fgg fgi fgn fgr fgs fia fic fie fif fig fii fik fin fir fis fka fkc fkf fkg fki fkk fna fnc fne fnf fng fni fnk fnn fnr fns fra frc fre frf frg fri frk frn frr frs fsa fsc fse fsf fsg fsi fsk fsn fsr fss gaa gac gae gaf gag gai gak gan gar gas gca gcc gce gcf gcg gci gck gcn gcr gcs ge- gea gec gee gef geg gei gek gen ger ges gfa gfc gfe gff gfi gfk gfr gfs gga ggc ggg ggi ggn ggr ggs gia gic gie gif gig gii gik gin gir gis gka gkn gks gna gnc gne gnf gni gnn gnr gns gra grc gre grf grg gri grk grn grr grs gsa gsc gse gsf gsg gsi gsk gsn gsr gss i-f ia- iaa iac iae iaf iag iai ian iar ias ica icc ice icf icg ici ick icn icr ics ie- iea iec iee ief ieg iei iek ien ier ies ifa ifc ife iff ifg ifi ifn ifr ifs iga igc ige igf igg igi igk ign igr igs iia iic iie iif iii iin iir iis ika ikc ike ikf iki ikk ikr iks in- ina inc ine inf ing ini ink inn inr ins ir- ira irc ire irf irg iri irk irn irr irs is- isa isc ise isf isg isi isk isn isr iss ka- kaa kac kae kaf kag kai kak kan kar kas kca kcc kce kcg kci kck kcn kcr kcs ke- kea kec kee kef keg kei kek ken ker kes kfa kfc kff kfg kfi kfs kga kgc kgf kgi kgs kia kic kie kif kig kii kik kin kir kis kkc kke kki kkk kkn kkr kks kn- kna knc kne knf kng kni knk knn knr kra krc krf krg kri krk krn krr krs ksa ksc kse ksf ksg ksi ksk ksn ksr kss n-i naa nac nae naf nag nai nak nan nar nas nca ncc nce ncf ncg nci nck ncn ncr ncs ne- nea nec nee nef neg nei nek nen ner nes nfa nfc nfe nff nfi nfk nfn nfr nfs nga ngc nge ngf ngg ngi ngk ngn ngs nia nic nie nif nig nii nik nin nir nis nka nkc nke nkf nki nkk nkn nkr nks nna nnc nne nnf nng nni nnk nnn nns nra nrc nre nrf nrg nri nrk nrn nrr nrs nsa nsc nse nsf nsg nsi nsk nsn nsr nss ra- raa rac rae raf rag rai rak ran rar ras rca rcc rce rcf rcg rci rcn rcr rcs re- rea rec ree ref reg rei rek ren rer res rfa rfc rfe rff rfg rfi rfk rfn rfr rfs rga rgc rge rgf rgg rgi rgk rgn rgr rgs ria ric rie rif rig rii rik rin rir ris rkc rke rkf rkg rkk rks rna rnc rng rni rnn rnr rns rra rrc rrf rrg rri rrk rrn rrr rrs rsa rsc rse rsf rsg rsi rsk rsn rsr rss saa sac sae saf sag sai sak san sar sas sca scc sce scf scg sci sck scn scr scs se- sea sec see sef seg sei sek sen ser ses sfa sfc sfe sff sfg sfi sfk sfn sfr sfs sga sgc sge sgf sgg sgi sgk sgn sgr sgs sia sic sie sif sig sii sik sin sir sis sk- ska skc ske skf skg ski skk skr sks sna snc sne snf sng sni snk snn snr sns sr- sra src sre srf srg sri srk srn srr srs ss- ssa ssc sse ssf ssg ssi ssk ssn ssr sss