-er -ic c-- ccc cce cci ccn cco ccr ce- cec cee cei cen ceo cer ci- cic cie cii cin cio cir cn- cnc cne cni cnn cno cnr co- coc coe coi con coo cor crc cre cri crn cro crr ec- ecc ece eci ecn eco ecr eec eee een eeo eer eic eie eii ein eio eir en- enc ene eni enn eno enr eo- eoc eoe eoi eon eoo eor erc ere eri ern ero err icc ice ici icn ico icr ie- iec iee iei ien ier iic iie iii iin iio iir in- inc ine ini inn ino inr io- ioc ioe ioi ion ioo ior ir- irc ire iri irn iro irr n-i ncc nce nci ncn nco ncr ne- nec nee nei nen neo ner nic nie nii nin nio nir nnc nne nni nnn nno no- noc noe noi non noo nor nrc nre nri nrn nro nrr o-i oc- occ oci ocn oco ocr oec oee oei oen oeo oer oic oie oii oin oio oir on- onc one oni onn ono onr oo- ooc ooi oon ooo oor or- orc ore ori orn oro orr rcc rce rci rcn rco rcr re- rec ree rei ren reo rer ric rie rii rin rio rir rnc rni rnn rno rnr roc roe roi ron roo ror rrc rri rrn rrr