-er -ic c-- ccc cce ccf cci ccn cco ccr ccs ce- cec cee cef cei cen ceo cer ces cfc cfe cff cfi cfn cfo cfr cfs ci- cic cie cif cii cin cio cir cis cn- cnc cne cnf cni cnn cno cnr cns co- coc coe cof coi con coo cor cos crc cre crf cri crn cro crr crs csc cse csf csi csn cso csr css ec- ecc ece ecf eci ecn eco ecr ecs eec eee eef een eeo eer ees ef- efc efe eff efi efo efr efs eic eie eif eii ein eio eir eis en- enc ene enf eni enn eno enr ens eo- eoc eoe eof eoi eon eoo eor eos erc ere erf eri ern ero err ers es- esc ese esf esi esn eso esr ess fcc fce fcf fci fcn fco fcr fcs fec fee fef fei fen feo fer fes ffc ffe fff ffi ffn ffo ffr ffs fic fie fif fii fin fir fis fnc fne fnf fni fnn fnr fns foc foe fof foi fon foo for fos frc fre frf fri frn fro frr frs fsc fse fsf fsi fsn fso fsr fss i-f icc ice icf ici icn ico icr ics ie- iec iee ief iei ien ier ies ifc ife iff ifi ifn ifo ifr ifs iic iie iif iii iin iio iir iis in- inc ine inf ini inn ino inr ins io- ioc ioe iof ioi ion ioo ior ios ir- irc ire irf iri irn iro irr irs is- isc ise isf isi isn iso isr iss n-i ncc nce ncf nci ncn nco ncr ncs ne- nec nee nef nei nen neo ner nes nfc nfe nff nfi nfn nfo nfr nfs nic nie nif nii nin nio nir nis nnc nne nnf nni nnn nno nns no- noc noe nof noi non noo nor nos nrc nre nrf nri nrn nro nrr nrs nsc nse nsf nsi nsn nso nsr nss o-i oc- occ ocf oci ocn oco ocr ocs oec oee oef oei oen oeo oer oes of- ofc ofe off ofi ofn ofo ofr ofs oic oie oif oii oin oio oir ois on- onc one onf oni onn ono onr ons oo- ooc oof ooi oon ooo oor oos or- orc ore orf ori orn oro orr ors os- osc ose osf osi osn oso osr oss rcc rce rcf rci rcn rco rcr rcs re- rec ree ref rei ren reo rer res rfc rfe rff rfi rfn rfo rfr rfs ric rie rif rii rin rio rir ris rnc rni rnn rno rnr rns roc roe rof roi ron roo ror ros rrc rrf rri rrn rrr rrs rsc rse rsf rsi rsn rso rsr rss scc sce scf sci scn sco scr scs se- sec see sef sei sen seo ser ses sfc sfe sff sfi sfn sfo sfr sfs sic sie sif sii sin sio sir sis snc sne snf sni snn sno snr sns soc soe sof soi son soo sor sos sr- src sre srf sri srn sro srr srs ss- ssc sse ssf ssi ssn sso ssr sss