-er -ic c-- ccc cce cci cck cco ccr ccz ce- cec cee cei cek ceo cer cez ci- cic cie cii cik cio cir ckc cki cko co- coc coe coi cok coo cor coz crc cre cri crk cro crr crz cz- czc cze czk czo ec- ecc ece eci eck eco ecr eec eee eek eeo eer eic eie eii eik eio eir ekc eke eki eko ekr eo- eoc eoe eoi eok eoo eor erc ere eri erk ero err erz eze ezo ezr ezz icc ice ici ick ico icr icz ie- iec iee iei iek ier iic iie iii iio iir ikc ike iki ikk iko ikr io- ioc ioe ioi ioo ior ir- irc ire iri irk iro irr ize izi izo izz k-z kcc kce kci kck kcr ke- kec kee kei kek keo ker kez kic kie kii kik kio kir kiz kkc kke kki kkk kkr koc koe koi kok koo kor koz krc kri krk kro krr kzo o-i oc- occ oci ock oco ocr ocz oec oee oei oeo oer oic oie oii oik oio oir oiz okc oke oki okk oko okr oo- ooc ooi ook ooo oor or- orc ore ori ork oro orr orz oze ozo ozz rcc rce rci rco rcr re- rec ree rei rek reo rer rez ric rie rii rik rio rir riz rkc rke rkk rko rkz roc roe roi rok roo ror roz rrc rri rrk rrr rze rzo zce zco zec zee zek zeo zer zez zie zik zio zir ziz zo- zoc zoe zoi zok zoo zor zro zzr zzz