-er -ic c-- ccc cce cci ccn cco ccr ccs ce- cec cee cei cen ceo cer ces ci- cic cie cii cin cio cir cis cn- cnc cne cni cnn cno cnr cns co- coc coe coi con coo cor cos crc cre cri crn cro crr crs csc cse csi csn cso csr css ec- ecc ece eci ecn eco ecr ecs eec eee een eeo eer ees eic eie eii ein eio eir eis en- enc ene eni enn eno enr ens eo- eoc eoe eoi eon eoo eor eos erc ere eri ern ero err ers es- esc ese esi esn eso esr ess icc ice ici icn ico icr ics ie- iec iee iei ien ier ies iic iie iii iin iio iir iis in- inc ine ini inn ino inr ins io- ioc ioe ioi ion ioo ior ios ir- irc ire iri irn iro irr irs is- isc ise isi isn iso isr iss n-i ncc nce nci ncn nco ncr ncs ne- nec nee nei nen neo ner nes nic nie nii nin nio nir nis nnc nne nni nnn nno nns no- noc noe noi non noo nor nos nrc nre nri nrn nro nrr nrs nsc nse nsi nsn nso nsr nss o-i oc- occ oci ocn oco ocr ocs oec oee oei oen oeo oer oes oic oie oii oin oio oir ois on- onc one oni onn ono onr ons oo- ooc ooi oon ooo oor oos or- orc ore ori orn oro orr ors os- osc ose osi osn oso osr oss rcc rce rci rcn rco rcr rcs re- rec ree rei ren reo rer res ric rie rii rin rio rir ris rnc rni rnn rno rnr rns roc roe roi ron roo ror ros rrc rri rrn rrr rrs rsc rse rsi rsn rso rsr rss scc sce sci scn sco scr scs se- sec see sei sen seo ser ses sic sie sii sin sio sir sis snc sne sni snn sno snr sns soc soe soi son soo sor sos sr- src sre sri srn sro srr srs ss- ssc sse ssi ssn sso ssr sss