-er -ic c-- ccc cce cci cco ccr ccz ce- cec cee cei ceo cer cez ci- cic cie cii cio cir co- coc coe coi coo cor coz crc cre cri cro crr crz cz- czc cze czo ec- ecc ece eci eco ecr eec eee eeo eer eic eie eii eio eir eo- eoc eoe eoi eoo eor erc ere eri ero err erz eze ezo ezr ezz icc ice ici ico icr icz ie- iec iee iei ier iic iie iii iio iir io- ioc ioe ioi ioo ior ir- irc ire iri iro irr ize izi izo izz o-i oc- occ oci oco ocr ocz oec oee oei oeo oer oic oie oii oio oir oiz oo- ooc ooi ooo oor or- orc ore ori oro orr orz oze ozo ozz rcc rce rci rco rcr re- rec ree rei reo rer rez ric rie rii rio rir riz roc roe roi roo ror roz rrc rri rrr rze rzo zce zco zec zee zeo zer zez zie zio zir ziz zo- zoc zoe zoi zoo zor zro zzr zzz